CN206684601U - Power output stage with unique short-circuit protection - Google Patents
Power output stage with unique short-circuit protection Download PDFInfo
- Publication number
- CN206684601U CN206684601U CN201720344926.1U CN201720344926U CN206684601U CN 206684601 U CN206684601 U CN 206684601U CN 201720344926 U CN201720344926 U CN 201720344926U CN 206684601 U CN206684601 U CN 206684601U
- Authority
- CN
- China
- Prior art keywords
- transistor
- stage
- differential pair
- pair tube
- bias current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000005070 sampling Methods 0.000 claims abstract description 34
- 230000008878 coupling Effects 0.000 claims description 19
- 238000010168 coupling process Methods 0.000 claims description 19
- 238000005859 coupling reaction Methods 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 3
- 239000013078 crystal Substances 0.000 description 7
- 102100040678 Programmed cell death protein 1 Human genes 0.000 description 6
- 101710089372 Programmed cell death protein 1 Proteins 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Amplifiers (AREA)
Abstract
A kind of power output stage with unique short-circuit protection, including：Differential Input unit, provided with the first differential pair tube, second differential pair tube, image current source circuit, first resistor, the loop that second resistance is formed, image current source circuit couples with the second differential pair tube and turns into the load of the second differential pair tube, first resistor is respectively symmetrically coupled between the base stage of the emitter stage of first differential pair tube and the second differential pair tube, second resistance, first differential pair tube, the input in the second differential pair tube input of reception bias current source, first differential pair tube couples a reference voltage and sampled voltage, first differential pair tube, second differential pair tube benchmark voltage and sampled voltage are to produce the first output signal, and colelctor electrode of first output signal through the second differential pair tube is delivered into middle amplifying unit；Middle amplifying unit, receive the first output signal and amplify according to the first output signal to produce one second output signal；Power output unit is controlled by the driving of the second output signal and to amplifying according to the second output signal and exporting an output voltage；Sampling unit, coupled with power output unit, partial pressure is carried out to output voltage to produce sampled voltage, and sampled voltage is exported to Differential Input unit.
Description
Technical field
The power output stage applied to short-circuit protection is the utility model is related to, the setting of its short circuit current is simple, can be from approximation 0
To the mistake flow point of power output stage, line construction is succinct, easy of integrationization.
Background technology
For a long time, most power output stage only has overcurrent protection, without short-circuit protection.It is assumed that power output stage
Input voltage vin is 12V, and output voltage Vout is 9V, and output overcurrent protection point IoM is 2A.Its power attenuation during normal work
PD 1 is (Vin-Vout) × IoM=6W.But in output short-circuit, its power attenuation PD 2 is (Vin-0) × IoM=24W.It is defeated
Its power attenuation PD 1 when power attenuation PD 2 when going out short circuit is much larger than normal work.Requirement so to power output tube is just
It must be designed by the power attenuation PD 2 during output short-circuit, this is very uneconomic.Otherwise, power output tube is in output short-circuit
Shi Jiyi is damaged.
Though there is sub-fraction power output stage to have short-circuit protection, its short circuit current Ios is by input voltage vin and output electricity
Vout differences are pressed to set.
The input voltage vin of a certain power output stage is 12V, and output voltage Vout is 9V, and output overcurrent protection point IoM is
2A.When (Vin-Vout) difference is 9V, output current Io is 2A；When (Vin-Vout) difference is 12V, output current Io is 1A；
When (Vin-Vout) difference is 18V, output current Io is 100mA.Its power attenuation PD 1 is (Vin-Vout) during normal work
× IoM=6W.But in output short-circuit, its power attenuation PD2 is (Vin-0) × Ios=12W.
The input voltage vin of another power output stage is 9V, and output voltage Vout is 6V, and output overcurrent protection point IoM is
2A.When (Vin-Vout) difference is 9V, output current Io is 2A；When (Vin-Vout) difference is 12V, output current Io is 1A；
When (Vin-Vout) difference is 18V, output current Io is 100mA.Its power attenuation PD 1 is (Vin-Vout) during normal work
× IoM=6W.But in output short-circuit, its power attenuation PD2 is (Vin-0) × Ios=18W.
So the power output stage of this short-circuit protection is also failed to power attenuation PD2 during output short-circuit much smaller than just
The often power attenuation PD 1 during work.
Power attenuation PD 1 power is defeated when power attenuation PD2 of user's needs in output short-circuit is much smaller than normal work
Go out level.
Utility model content
In order to solve the above problems, the utility model discloses a kind of power output stage with unique short-circuit protection, bag
Include：
Differential Input unit, provided with the first differential pair tube, the second differential pair tube, an image current source circuit, one first electricity
The loop that resistance, a second resistance are formed, image current source circuit couple with the second differential pair tube and turn into the second differential pair tube
Load, respectively symmetrically couples the first resistor, institute between the emitter stage of the first differential pair tube and the base stage of the second differential pair tube
Second resistance, the first differential pair tube, the second differential pair tube coupling bias current sources are stated, the first differential pair tube couples a reference voltage
With a sampled voltage, the first differential pair tube, the second differential pair tube are according to the reference voltage and the sampled voltage to produce
First output signal, and the colelctor electrode of first output signal through the second differential pair tube is delivered into middle amplifying unit；
The colelctor electrode coupling of the middle amplifying unit and the second differential pair tube, interior be provided with of the middle amplifying unit have
The Darlington transistor of enlarging function, Darlington transistor receive first output signal and amplified according to the first output signal to produce one
Second output signal；
Power output unit, coupled with the middle amplifying unit, be controlled by second output signal driving and according to
Amplify according to the second output signal and export an output voltage；
Sampling unit, coupled with power output unit, partial pressure is carried out to output voltage to produce the sampled voltage, and will
The sampled voltage is exported to the Differential Input unit.
The described power output stage with unique short-circuit protection, Differential Input unit further comprise：The first transistor,
Second transistor, third transistor, the 4th transistor, the 5th transistor, the 6th transistor, wherein, the first transistor,
Two-transistor forms first differential pair tube, and third transistor, the 4th transistor form the second differential pair tube, the 5th crystal
Pipe, the 6th transistor form the image current source circuit.
The described power output stage with unique short-circuit protection, bias current sources include the first bias current sources, second
Bias current sources, the 3rd bias current sources, the second bias current sources and the 3rd bias current sources are equal in magnitude or unequal, the
One bias current sources, the second bias current sources, the 3rd bias current sources couple with power end, and the first bias current sources are second
Differential pair tube provides bias current, and the second bias current sources and the 3rd bias current sources provide biased electrical for the first differential pair tube
Stream.
The described power output stage with unique short-circuit protection, the emitter stage and third transistor of the first transistor
Base stage between couple a first resistor, the base stage of the first transistor couples the reference voltage, the first transistor
Emitter stage, base stage and second bias current sources of third transistor couple；
A second resistance is coupled between the base stage of the emitter stage of the second transistor and the 4th transistor, second is brilliant
The base stage of body pipe couples the sampled voltage, the emitter stage of the second transistor, the base stage and the described 3rd of the 4th transistor
Bias current sources couple；
The emitter stage of the third transistor, emitter stage and first bias current sources of the 4th transistor couple, institute
State the colelctor electrode of third transistor and colelctor electrode colelctor electrode, the 6th crystal with the 5th transistor respectively of the 4th transistor
The colelctor electrode of pipe is corresponding to be coupled, the transmitting of the emitter stage of the 5th transistor, the emitter stage, the first transistor of the 6th transistor
Pole, the emitter stage of second transistor couple ground voltage, the base stage of the 5th transistor and the base stage coupling of the 6th transistor
Connect, the colelctor electrode of third transistor couples with the base stage of the 5th transistor and the base stage of the 6th transistor respectively；
The colelctor electrode of 6th transistor and middle amplifying unit couple.
The described power output stage with unique short-circuit protection, the middle amplifying unit also include one and reach woods with described
One anti-free-running circuit of pipe coupling, the base stage of the anti-free-running circuit and the 6th transistor, the base stage of Darlington transistor, reach
The colelctor electrode coupling of Islington pipe, the colelctor electrode of the Darlington transistor couple with the power output unit, the Darlington transistor
Emitter stage couples ground voltage.
The described power output stage with unique short-circuit protection, the Darlington transistor are the 7th crystal being sequentially connected
The same polar form Darlington triode that pipe, the 8th transistor are formed, the 7th transistor, the 8th transistor are NPN type triode, the 7th
Series winding connects a resistance between the emitter stage and ground voltage of transistor.
The described power output stage with unique short-circuit protection, the power output unit include one the 9th transistor,
One upper offset resistance, once biasing resistor, an output end, emitter stage and the power end of the 9th transistor couple, institute
State the emitter stage and the 7th transistor, the 8th of upper offset resistance, the below-center offset resistant series in the 9th transistor
Between the colelctor electrode of transistor, the base stage of the 9th transistor is coupled between upper offset resistance and the below-center offset resistance,
The colelctor electrode of 9th transistor is coupled with the sampling unit, and the output end is drawn from the colelctor electrode of the 9th transistor.
The described power output stage with unique short-circuit protection, the sampling unit include the first sampling resistor, second
Sampling resistor, first sampling resistor, the second sampling resistor are series at the colelctor electrode and ground voltage of the 9th transistor
Between, first sampling resistor, the second sampling resistor to the output voltage partial pressure to produce the sampled voltage, and through setting
Put the base stage that the feedback line between first sampling resistor, the second sampling resistor is delivered to the second transistor.
The emitter stage of the described power output stage with unique short-circuit protection, the first bias current sources and third transistor
Between, it is respectively coupled to a resistance between the emitter stage of the first bias current sources and the 4th transistor.
The invention also discloses a kind of integrated circuit, includes the power output stage as described in claim 1-9 is any.
In summary, the utility model patent has the power output stage of unique short-circuit protection, for its work(of prior art
Effect is：
1. power attenuation P during output short-circuitD2 are much smaller than power attenuation P during normal workD 1。
2. short-circuit output current Ios is controlled by the second resistance R2 in Differential Input unit.
Brief description of the drawings
Fig. 1 has the circuit diagram of the power output stage of unique short-circuit protection.
Wherein reference is：
Power end Vin；The first transistor T1；Second transistor T2；Third transistor T3；4th transistor T4；5th is brilliant
Body pipe T5；6th transistor T6；7th transistor T7；8th transistor T8；9th transistor T9；First resistor R1；Second electricity
Hinder R2；3rd resistor R3；4th resistance R4；5th resistance R5；6th resistance R6；Upper offset resistance R7；Below-center offset resistance R8；The
One sampling resistor R9；Second sampling resistor R10, ground voltage GND.
Embodiment
Technical solutions of the utility model are described in detail with specific embodiment below in conjunction with the accompanying drawings, with further
Understand the purpose of this utility model, scheme and effect, but be not limited to the utility model.
Fig. 1 is refer to, Fig. 1 is the power output stage with unique short-circuit protection that the utility model preferred embodiment provides
Schematic diagram.As shown in figure 1, the power output stage with unique short-circuit protection that the utility model preferred embodiment provides, bag
Contain：Differential Input unit, middle amplifying unit, power output unit and sampling unit.
Differential Input unit, the input of an at least bias current sources is coupled, and receive a reference voltage V ref, a sampling electricity
For pressure Vsa to produce one first output signal, further Differential Input unit includes the first differential pair tube, the second differential pair tube, one
Image current source circuit, a first resistor, a second resistance；
An at least bias current sources include the first current source I1, the second current source I2, the 3rd bias current sources, the second electric current
Source I2 and the 3rd bias current sources I3 are equal in magnitude or unequal, the first current source I1, the second current source I2, the 3rd biased electrical
Stream source I3 couples with power end Vin.
Differential Input unit further comprises：The first transistor T1, second transistor T2, third transistor T3, the 4th crystalline substance
Body pipe T4, the 5th transistor T5, the 6th transistor T6, wherein, the first transistor T1, second transistor T2 form the first differential pair
Pipe, third transistor T3, the 4th transistor T4 form the second differential pair tube, and the 5th transistor T5, the 6th transistor T6 form the
The mirror current source load of two differential pair tubes.First current source I1 provides bias current, the second current source for the second differential pair tube
I2 and the 3rd current source I3 provide bias current for the first differential pair tube.
A first resistor R1, first crystal are coupled between the first transistor T1 emitter stage and third transistor T3 base stage
Pipe T1 base stage coupling reference voltage V ref, the first transistor T1 emitter stage, third transistor T3 base stage and the second electric current
Source I2 is coupled；
A second resistance R2, the second crystal are coupled between second transistor T2 emitter stage and the 4th transistor T4 base stage
Pipe T2 base stage coupling sampled voltage Vsa, second transistor T2 emitter stage, the 4th transistor T4 base stage and the 3rd biased electrical
Stream source I3 is coupled；
Third transistor T3 emitter stage, the 4th transistor T4 emitter stage and the first current source I1 are coupled, the 3rd crystal
Pipe T3 emitter stage, the 4th transistor T4 emitter stage and the first current source I1 between concatenate respectively 3rd resistor R3 and the 4th electricity
Hinder R4, third transistor T3 colelctor electrode and the 4th transistor T4 the colelctor electrode colelctor electrode with the 5th transistor T5, the respectively
Six transistor T6 colelctor electrode is corresponding to be coupled, the 5th transistor T5 emitter stage, the 6th transistor T6 emitter stage, first crystal
Pipe T1 emitter stage, second transistor T2 emitter stage couple ground voltage GND, and the 5th transistor T5 base stage is brilliant with the 6th
Body pipe T6 base stage coupling, third transistor T3 colelctor electrode respectively the base stage with the 5th transistor T5 with the 6th transistor T6's
Base stage couples；6th transistor T6 colelctor electrode and middle amplifying unit couple.
Middle amplifying unit, coupled with the Differential Input unit, receive first output signal and foundation first is defeated
Go out signal amplification to produce one second output signal；The middle amplifying unit includes：One Darlington transistor and the Darlington transistor
One anti-free-running circuit of coupling, the base stage, the base stage of Darlington transistor, Da Lin of the anti-free-running circuit and the 6th transistor T6
The colelctor electrode coupling of pipe, the colelctor electrode of Darlington transistor couple with the power output unit, the emitter stage coupling of Darlington transistor
Ground voltage GND.The Darlington transistor is the same polar form Darlington that the 7th transistor T7, the 8th transistor being sequentially connected are formed
Triode, the 7th transistor T7, the 8th transistor T8 are NPN type triode, the 7th transistor T7 emitter stage and ground voltage
Series winding meets one the 6th resistance R6 between GND.
Anti- free-running circuit includes the loop that one the 5th resistance R5, an electric capacity C1 are formed, and the 5th resistance R5 is brilliant with the described 7th
Body pipe T7 colelctor electrode coupling, electric capacity the C1 base stage with the 7th transistor T7, the 6th transistor T6 of Differential Input unit respectively
Colelctor electrode coupling, between the 7th transistor T7 emitter stage and ground voltage GND concatenate the 6th resistance R6 to increase by the
Seven transistor T7 operating current.
Power output unit, coupled with the middle amplifying unit, be controlled by the driving of second output signal and right
Amplify according to the second output signal and export an output voltage；The power output unit is including on one the 9th transistor T9, one
Biasing resistor R7, once biasing resistor R8, an output end, emitter stage and the power end of the 9th transistor T9 couple,
The upper offset resistance, the below-center offset resistant series are in the emitter stage of the 9th transistor T9 and the collection of the Darlington transistor
Between electrode, the base stage of the 9th transistor T9 is coupled between upper offset resistance R7 and the below-center offset resistance R8, also
To say, below-center offset resistance R8 be coupled to the 9th transistor T9 base stage and middle amplifying unit in the 7th transistor T7, the 8th brilliant
Between body pipe T8 colelctor electrode, to limit the maximum current for flowing through transistor T7, T8.Collection of the output end from the 9th transistor T9
Electrode is drawn.
Sampling unit, is coupled with the 9th transistor T9 of power output unit colelctor electrode, and partial pressure is carried out to output voltage
To produce the sampled voltage Vsa, and the sampled voltage Vsa is exported to the Differential Input unit.Further, it is described to adopt
Sample unit includes the first sampling resistor R9, the second sampling resistor R10, the first sampling resistor R9, the second sampling resistor R10 string
It is coupled between colelctor electrode and the ground voltage GND of the 9th transistor T9, the base stage of the second transistor T2 is coupled to institute
State R10 between the first sampling resistor R9, the second sampling resistor.
Connection more than, when the output head grounding of power output stage, the 9th transistor T9 collector current will
It is controlled by the pressure drop on second resistance R2 in Differential Input unit.
Connection more than, when the output end of power output stage is earth-free and output voltage reaches voltage stabilizing value Vref (R9+
R10 before)/R10.I.e. output voltage is in 0 ＜ Vout≤Vref (R9+R10)/R10.The input both ends of Differential Input unit connect respectively
Meet reference voltage V ref and the sampled voltage Vsa more than zero and less than or equal to Vref, the first output signal drive middle amplify
Unit, the second output signal is exported with driving power output unit after the middle amplifying unit amplification of high-gain, is now driven
The collector current of the 9th transistor T9 in power output unit is not limited, and the could be limited by only increasing overcurrent protection loop
Nine transistor T9 collector current.
When the output head grounding of power output stage, i.e. output voltage Vout=0.The input both ends of Differential Input unit point
Lian Jie not reference voltage Vref and power end Vin, wherein power end Vin=0.The 4th transistor T4's in Differential Input unit
Collector potential V4c is：
V4c=Vbe2+ (I1+I2) × R2+Vbe4-Vces4 (1)
Wherein：Vbe2 be second transistor T2 emitter base voltage, Vbe2=VTLn (Ie2/Ies2), Ie2
Two-transistor T2 emitter current, Ie2=I1+I2, VT≈ 26mV, Ies2 are the second transistor T2 reverse saturation of emitter stage
Leakage current, the reverse drain saturation current of emitter stage are determined by transistor fabrication process and launch site area；4th transistor T4 and
Two-transistor T2 types are identical and equal in magnitude, and reverse drain saturation current is equal, and Vbe4 is the 4th transistor T4 emitter stage-base
Pole tension, Vbe4=VTLn (Ie4/Ies), Ie4 be the 4th transistor T4 emitter current, Ie4=I1；Vces4 is the 4th
Transistor T4 saturation voltage drop, now the 4th transistor T4 collector current is approximately zero, in deep saturated mode, Vces4 ≈
0。
The base potential V7b of the 7th transistor T7 in middle amplifying unit and the 4th transistor in Differential Input unit
T4 collector potential V4c is equal.I.e.
V7b=V4c (2)
Base potential V7b for the 7th transistor T7 in middle amplifying unit is：
V7b=Vbe7+Vbe8 (3)
Wherein：Vbe7 be the 7th transistor T7 emitter base voltage, Vbe7=VTLn (Ie7/Ies7), Ie7
Seven transistor T7 emitter current, Ies7 are the 7th transistor T7 reverse drain saturation current of emitter stage；Vbe8 is transistor
T8 emitter base voltage, Vbe8=VTThe reverse saturation leakage of emitter stage that ln (Ie8/Ies8), Ies8 are the 8th transistor T8
Electric current, the 8th transistor T8 is identical with the 7th transistor T7 types, the 8th transistor T8 and the 7th transistor T7 launch sites area
The ratio between be N, Ies8=N × Ies7.
For power output unit, short-circuit output current Ios is：
Ios=β × (Ic7+Ic8-Vbe9/R7) (4)
Wherein：β is transistor T9 direct current multiplication factor；Ic7 be the 7th transistor T7 collector current, Ic7 ≈
Ie7；Ic8 be the 8th transistor T8 collector current, Ic8 ≈ Ie8；The emitter stage that Vbe9 is the 9th transistor T9-base stage electricity
Pressure, Vbe9=VTLn (Ie9/Ies9), Ie9=Ios (1+ β)/β, Ie9 is the 9th transistor T9 emitter current, and Ies9 is
The 9th transistor T9 reverse drain saturation current of emitter stage.
Simultaneous formula 1~4, it is seen that short-circuit output current Ios is controlled by resistance R2.
The beneficial effect that specific embodiment illustrates power output stage provided by the utility model, such as a certain power are lifted below
The input voltage vin of output stage is 12V, and output voltage Vout is 9V, and output overcurrent protection point IoM is 2A.Short-circuit output current
Ios is 200mA.Its power attenuation P during normal workD1 is (Vin-Vout) × IoM=6W.But in output short-circuit, its power
P is lostD2 be (Vin-0) × Ios=2.4W.
The input voltage vin of another power output stage is 9V, and output voltage Vout is 6V, and output overcurrent protection point IoM is
2A.Short circuit current is 100mA.Its power attenuation P during normal workD1 is (Vin-Vout) × IoM=6W.In output short-circuit,
Its power attenuation PD2 be (Vin-0) × Ios=0.9W.
Other the utility model additionally provides a kind of integrated circuit, is protected comprising at least one uniqueness short circuit as shown in Figure 1
The power output stage of shield.But the utility model is not limited thereto, user can be according to actual use in other embodiments
Need to be designed to the circuit of multichannel power output.
Certainly, the utility model can also have other various embodiments, without departing substantially from the utility model spirit and its essence
In the case of, those skilled in the art work as can make various corresponding changes and deformation according to the utility model, but these
Corresponding change and deformation should all belong to the scope of the claims appended by the utility model.
Claims (10)
- A kind of 1. power output stage with unique short-circuit protection, it is characterised in that including：Differential Input unit, including the first differential pair tube, the second differential pair tube, an image current source circuit, a first resistor, one Second resistance, image current source circuit couple with the second differential pair tube and turn into the load of the second differential pair tube, the first differential pair Respectively symmetrically couple the first resistor, the second resistance between the base stage of the emitter stage of pipe and the second differential pair tube, first Differential pair tube, the second differential pair tube coupling bias current sources, the first differential pair tube couple a reference voltage and a sampled voltage, the One differential pair tube, the second differential pair tube according to the reference voltage and the sampled voltage to produce the first output signal, and The colelctor electrode of first output signal through the second differential pair tube is delivered into middle amplifying unit；The colelctor electrode coupling of the middle amplifying unit and the second differential pair tube, interior be provided with of the middle amplifying unit have amplification The Darlington transistor of function, Darlington transistor receive first output signal and amplified according to the first output signal to produce one second Output signal；Power output unit, coupled with the middle amplifying unit, be controlled by the driving of second output signal and according to the Two output signals are amplified and export an output voltage；Sampling unit, coupled with power output unit, partial pressure is carried out to the output voltage to produce the sampled voltage, and will The sampled voltage is exported to the Differential Input unit.
- 2. there is the power output stage of unique short-circuit protection as claimed in claim 1, it is characterised in that Differential Input unit enters One step includes：The first transistor, second transistor, third transistor, the 4th transistor, the 5th transistor, the 6th transistor, its In, the first transistor, second transistor form first differential pair tube, third transistor, the 4th transistor composition the Two differential pair tubes, the 5th transistor, the 6th transistor form the image current source circuit.
- 3. there is the power output stage of unique short-circuit protection as claimed in claim 2, it is characterised in that bias current sources include First bias current sources, the second bias current sources, the 3rd bias current sources, the second bias current sources and the 3rd bias current sources are big Small equal or unequal, the first bias current sources, the second bias current sources, the 3rd bias current sources couple with power end, First bias current sources provide bias current for the second differential pair tube, and the second bias current sources and the 3rd bias current sources are first Differential pair tube provides bias current.
- 4. there is the power output stage of unique short-circuit protection as claimed in claim 3, it is characterised in thatA first resistor, the first transistor are coupled between the emitter stage of the first transistor and the base stage of third transistor Base stage couple the reference voltage, the emitter stage of the first transistor, the base stage of third transistor and the described second biasing Current source couples；A second resistance, second transistor are coupled between the base stage of the emitter stage of the second transistor and the 4th transistor Base stage couple the sampled voltage, base stage and the described 3rd biasing of the emitter stage of the second transistor, the 4th transistor Current source couples；The emitter stage of the third transistor, emitter stage and first bias current sources of the 4th transistor couple, and described the The colelctor electrode of the colelctor electrode of three transistors and the 4th transistor colelctor electrode with the 5th transistor, the 6th transistor respectively Colelctor electrode is corresponding to be coupled, the emitter stage of the 5th transistor, the emitter stage of the 6th transistor, the first transistor emitter stage, The emitter stage of second transistor couples ground voltage, and the base stage of the 5th transistor couples with the base stage of the 6th transistor, The colelctor electrode of third transistor couples with the base stage of the 5th transistor and the base stage of the 6th transistor respectively；The colelctor electrode of 6th transistor and middle amplifying unit couple.
- 5. there is the power output stage of unique short-circuit protection as claimed in claim 4, it is characterised in that amplification is single among described Member also includes an anti-free-running circuit with Darlington transistor coupling, the base of the anti-free-running circuit and the 6th transistor Pole, the colelctor electrode coupling of the base stage of Darlington transistor, Darlington transistor, the colelctor electrode of the Darlington transistor and the power output unit Coupling, the emitter stage coupling ground voltage of the Darlington transistor.
- 6. there is the power output stage of unique short-circuit protection as claimed in claim 5, it is characterised in that the Darlington transistor is The same polar form Darlington triode that the 7th transistor, the 8th transistor being sequentially connected are formed, the 7th transistor, the 8th transistor For NPN type triode, series winding connects a resistance between the emitter stage and ground voltage of the 7th transistor.
- 7. there is the power output stage of unique short-circuit protection as claimed in claim 6, it is characterised in that the power output list Member includes one the 9th transistor, once a upper offset resistance, biasing resistor, an output end, the emitter stage of the 9th transistor With the power end couple, the upper offset resistance, the below-center offset resistant series in the 9th transistor emitter stage with 7th transistor, the 8th transistor colelctor electrode between, the base stage of the 9th transistor be coupled to upper offset resistance with Between the below-center offset resistance, the colelctor electrode of the 9th transistor couples with the sampling unit, and the output end is from the 9th The colelctor electrode of transistor is drawn.
- 8. there is the power output stage of unique short-circuit protection as claimed in claim 7, it is characterised in that the sampling unit bag The first sampling resistor, the second sampling resistor are included, first sampling resistor, the second sampling resistor are series at the 9th transistor Colelctor electrode and ground voltage between, first sampling resistor, the second sampling resistor are to the output voltage partial pressure to produce The sampled voltage, and the configured feedback line between first sampling resistor, the second sampling resistor is delivered to described The base stage of two-transistor.
- 9. there is the power output stage of unique short-circuit protection as claimed in claim 4, it is characterised in that the first bias current sources Between the emitter stage of third transistor, an electricity is respectively coupled between the emitter stage of the first bias current sources and the 4th transistor Resistance.
- 10. a kind of integrated circuit, include the power output stage as described in claim 1-9 is any.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720344926.1U CN206684601U (en) | 2017-04-01 | 2017-04-01 | Power output stage with unique short-circuit protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720344926.1U CN206684601U (en) | 2017-04-01 | 2017-04-01 | Power output stage with unique short-circuit protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206684601U true CN206684601U (en) | 2017-11-28 |
Family
ID=60398802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720344926.1U Withdrawn - After Issue CN206684601U (en) | 2017-04-01 | 2017-04-01 | Power output stage with unique short-circuit protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206684601U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108664075A (en) * | 2017-04-01 | 2018-10-16 | 无锡友达电子有限公司 | Power output stage with unique short-circuit protection |
-
2017
- 2017-04-01 CN CN201720344926.1U patent/CN206684601U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108664075A (en) * | 2017-04-01 | 2018-10-16 | 无锡友达电子有限公司 | Power output stage with unique short-circuit protection |
| CN108664075B (en) * | 2017-04-01 | 2024-02-23 | 无锡友达电子有限公司 | Power output stage with unique short circuit protection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107102671A (en) | Low-power consumption fast transient response low-voltage difference adjustor | |
| CN106301242A (en) | Current multiplexing type radio-frequency amplifier circuit | |
| CN206684601U (en) | Power output stage with unique short-circuit protection | |
| US5041797A (en) | Micro-power gain lattice | |
| CN106505961A (en) | The automatic gain control circuit of quick response | |
| CN107819445A (en) | A kind of big output voltage swing drive circuit of high speed | |
| CN102694511A (en) | Low-voltage driven integrated circuit amplifier for vehicle control circuit | |
| CN105811892B (en) | A kind of double bias supplying circuits of mobile terminal | |
| CN206302386U (en) | The automatic gain control circuit of quick response | |
| CN108664075A (en) | Power output stage with unique short-circuit protection | |
| CN105048864A (en) | Novel error-amplification-type piezoelectric ceramic driving circuit | |
| CN212323981U (en) | Novel MOS tube isolation driving circuit | |
| CN210669886U (en) | Current and voltage superposition type quick discharge circuit | |
| US8115552B2 (en) | Amplifier circuit with step gain | |
| CN211697965U (en) | Differential voltage acquisition circuit | |
| CN208656642U (en) | A kind of voltage-dropping type DC_DC converter circuit | |
| CN107645280A (en) | High speed amplifying circuit | |
| CN202513822U (en) | Low voltage driven buffer circuit chip | |
| CN206251224U (en) | Amplifier circuit for sound frequency signal and television set | |
| US6727755B2 (en) | High speed linear variable gain amplifier architecture | |
| CN110677028A (en) | Current and voltage superposition type quick discharge circuit | |
| CN217240687U (en) | Bidirectional output circuit | |
| CN108037788A (en) | A kind of LDO circuit | |
| CN218412684U (en) | Current detection circuit of high-voltage power circuit | |
| CN214591331U (en) | Overspeed protection amplifying circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171128 Effective date of abandoning: 20240223 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20171128 Effective date of abandoning: 20240223 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |