CN201352782Y - Signal generator - Google Patents
Signal generator Download PDFInfo
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- CN201352782Y CN201352782Y CNU2009200005512U CN200920000551U CN201352782Y CN 201352782 Y CN201352782 Y CN 201352782Y CN U2009200005512 U CNU2009200005512 U CN U2009200005512U CN 200920000551 U CN200920000551 U CN 200920000551U CN 201352782 Y CN201352782 Y CN 201352782Y
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Abstract
The utility model discloses a signal generator, which comprises a power supply circuit, a protecting circuit, a signal generating circuit, a frequency adjusting circuit, a contact control circuit, an indicating circuit and an output circuit, wherein the signal generator adopts a novel contact control mode to change the type of signals, which can generate square wave signals, triangular wave signals and sinusoidal wave signals, which satisfy the requirements, and a converting output port, which can display the working state, the type of the wave forms, the frequency and the like of the circuit, and the signal generator has the advantages of simple structure, convenient operation, high safety and the like.
Description
Technical field
The utility model relates to a kind of signal generator, more particularly, relates to a kind of simple in structure, easy to operate, signal generator that fail safe is good.
Background technology
Signal generator generally is also referred to as oscillator, can be used for producing the signal of certain frequency and amplitude, and is widely used in the fields such as measurement, communication, Power Conversion, power control.Known signal generator roughly can be divided into sine wave signal generator and non-sinusoidal waveform (as square wave, triangular wave etc.) signal generator according to the difference of signal output waveform.
Present signal generator is of a great variety, and performance is different.But along with the increase of signal generator function, the complexity of its structure also increases thereupon, cause the cost of signal generator and complicated operation degree to increase, and the fail safe of system and stability is reducing.Therefore, the circuit structure of signal generator is further improved.
The utility model content
At the deficiencies in the prior art, the purpose of this utility model be to provide a kind of simple in structure, easy to operate, fail safe is good and can produce the signal generator of multiple waveform signal.
For achieving the above object, the utility model provides a kind of signal generator, and it comprises the power circuit that is used to provide power supply; This signal generator also comprises the protective circuit that is used for guaranteeing the signal generator trouble free service, and the input of protective circuit is connected with the output of power circuit; Can produce the signal generating circuit of sine wave, square wave and triangular wave, signal generating circuit is connected with protective circuit; Be used for the frequency adjustment circuit of conditioning signal frequency, frequency adjustment circuit is connected with signal generating circuit; Be used for the output circuit of output signal, the input of output circuit is connected with the output of frequency adjustment circuit; Be used for the indicating circuit of shows signal generator operating state, the input of indicating circuit is connected with the output of power circuit, protective circuit and frequency generating circuit respectively; And being used for touch-control circuit with touch manner control signal generation circuit working state, the output of touch-control circuit is connected with the input of signal generating circuit, frequency adjustment circuit and output circuit respectively.
According to a preferred embodiment of the present utility model, protective circuit comprises the diode that is used for preventing the reversal connection of power circuit both positive and negative polarity.
According to another preferred embodiment of the present utility model, indicating circuit comprises light-emitting diode.
According to another preferred embodiment of the present utility model, touch-control circuit comprises the touch point that is used to respond to human body touch.
According to another one preferred embodiment of the present utility model, touch-control circuit comprises 4011B type NAND gate.
According to another one preferred embodiment of the present utility model, signal generating circuit comprises high input impedance type integrated transporting discharging CA3014.
According to another one preferred embodiment of the present utility model, signal generating circuit comprises the active leveling circuit of being made up of diode and voltage-stabiliser tube.
According to another one preferred embodiment of the present utility model, frequency adjustment circuit comprises the frequency-selective network of being made up of electric capacity, resistance and potentiometer.
The beneficial effects of the utility model are that this signal generator is with the signal of simple circuit design generation such as different wave such as sine wave, square wave and triangular waves, diverse in function; This signal generator adopts novel touch control manner to change the type of signal, and the conversion output port, and the type of operating state that can display circuit, waveform, frequency etc., and is user-friendly; In addition, the protective circuit of this signal generator has also designed current-limiting function, can cut off the electricity supply automatically after breaking down so that can not damage signal generator, and can recover operate as normal after removing barriers, and has improved the security performance of circuit.
Description of drawings
Fig. 1 is the circuit structure schematic diagram according to the signal generator of the utility model preferred embodiment;
Fig. 2 is protective circuit, indicating circuit and the sinusoidal wave touch-control circuit schematic diagram of signal generator shown in Figure 1;
Fig. 3 is the square wave touch-control circuit schematic diagram of signal generator shown in Figure 1;
Fig. 4 is the triangular wave touch-control circuit schematic diagram of signal generator shown in Figure 1;
Fig. 5 is the square wave and the triangular signal generation circuit theory diagrams of signal generator shown in Figure 1;
Fig. 6 is the sine wave signal generation circuit theory diagrams of signal generator shown in Figure 1;
Fig. 7 is the frequency selective network schematic diagram of signal generator shown in Figure 1; And
Fig. 8 is the freq converting circuit schematic diagram of signal generator shown in Figure 1.
Reference numeral:
R1～R42: resistance; C1～C16: electric capacity; D1～D16: diode; J1～J6: relay; LED1～LED5: light-emitting diode; BT1 and BT2: battery pack; VT1～VT11, VT13～VT15: triode; S1 and S2: switch; W1～W9: potentiometer; DW1～DW3: voltage-stabiliser tube; A～j, l, m, n: tie point; N1A～N6A: NAND gate; A: sinusoidal wave touch-control branch road; B: square wave touch-control branch road; C: triangular wave touch-control branch road.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described.
As shown in Figure 1; signal generator according to an embodiment of the utility model comprises: the power circuit that is used to provide power supply; be used for guaranteeing the protective circuit of signal generator trouble free service; can produce sine wave; the signal generating circuit of square wave and triangular wave; be used for the frequency adjustment circuit of conditioning signal frequency; be used for touch-control circuit with touch manner control signal generation circuit working state; be used for shows signal generator operating state indicating circuit and be used for the output circuit of output signal; wherein, power circuit; protective circuit; signal generating circuit; frequency adjustment circuit and output circuit series connection.In addition, power circuit, protective circuit and frequency adjustment circuit also have output to be connected with the input of indicating circuit respectively, and the output of touch-control circuit is connected with the input of signal generating circuit, frequency adjustment circuit and output circuit respectively.This signal generator can produce the sine wave signal that frequency is 1MHZ, can also produce square wave and triangular wave that frequency is the 2.25MHZ low distortion.
Operation principle according to the protective circuit of a preferred embodiment of the utility model has been shown among Fig. 2.Particularly, in this signal generator, be preferably 15V as the battery pack BT1 and the BT2 of power supply, the positive pole of BT1 connects VCC, and the negative pole of BT2 connects VEE.To after the signal generator energising, diode D1 and D2 are used for protective circuit, prevent that power positive cathode from connecing instead.When the entire circuit operate as normal, current flowing resistance R3, smaller in the voltage drop at resistance R 3 (resistance R 3 resistances are very little, R3=5 Ω in the present embodiment) two ends, not conductings of triode VT2, the voltage of relay J 1 is lower than rated operational voltage, thereby does not work.Under this operating state, LED 1 (preferred green light) is bright, the complete conducting of triode VT1, and LED 2 (preferred red light) is not luminous by short circuit simultaneously.
When overload or short circuit phenomenon occurring, the electric current by resistance R 3 sharply increases, and causes the voltage at resistance R 3 two ends also sharply to increase, and can make between the emitter junction of triode VT2 and form bigger voltage difference, makes triode VT2 saturation conduction.At this moment, the voltage of relay J 1 reaches rated operational voltage and starts working, and switch is disconnected, and promptly cuts off U_P and U_N, plays the effect of protective circuit.Simultaneously, because triode VT1 has lost base current, triode VT1 ends, the bright warning of LED 2 (preferred red light), when relay J 1 was started working, triode VT2 also can end because losing base current, but diode D3 is connected in parallel on the two ends of relay J 1 actuating coil, form the loop by diode D3 and this coil, produce electric current, with the operating time of delayed relay.
And for example shown in Figure 2, in preferred embodiment of the present utility model, the operation principle of sinusoidal wave touch-control circuit is as described below.If hand of no use contacts the touch point SIN_TOUCH of sinusoidal wave touch-control circuit, the collector electrode of triode VT3 is in high potential (being approximately 5V in the present embodiment), two inputs of NAND gate N1A (NAND gate in the present embodiment is selected 4011B type NAND gate for use) all are high level, NAND gate N1A output low level, not conducting of triode VT5, relay J 2 is not worked.
Under the situation that touches the touch point SIN_TOUCH that is arranged at triode VT3 base stage with hand, suppose not touch this moment other two touch point SQU_TOUCH and TRI_TOUCH, because human body has certain static, thereby make triode VT3 produce base current, cause two inputs 1 of NAND gate N1A and 2 voltage to be reduced to low level (in the present embodiment for about 2.5V) suddenly, make the output 3 output high level (in the present embodiment for about 8V) of NAND gate N1A thus.Because do not touch two touch points of SQU_TOUCH and TRI_TOUCH, so triode VT4 does not end, the high level of NAND gate N1A output is effective, make triode VT5 conducting, and then make relay J 2 reach rated operational voltage and start working, finish the butt joint of sinusoidal signal output SIN and signal output part OUT, and offset of sinusoidal ripple touch-control circuit is transferred to the conversion of the positive source line SIN_P and the power-polar curve SIN_N of sine wave signal generation circuit, and its transfer process can be by turn-offing sinusoidal wave and triangular wave is freeed the device power supply and realized.Sine power supply line SIN_P provides base current and self-locking takes place for triode VT5 through resistance R 10 and R11.Simultaneously, the high level of NAND gate N1A output also be input to as shown in Figure 3 triode VT7 and the base stage of triode VT10 as shown in Figure 4, thereby the self-locking of releasing square wave and triangular wave touch-control circuit.Diode D5 and D6 be used for preventing the high level of NAND gate N2A and N3A output influence each other separately control circuit and cause erroneous judgement.Diode D7 is used for protecting NAND gate.
Fig. 3 shows the square wave touch-control circuit of the utility model preferred embodiment, the operation principle of its operation principle and sinusoidal wave touch-control circuit is similar, be equally according to human body with static change electric current in the circuit, thereby change the operating state of square wave touch-control circuit.
Fig. 4 shows the triangular wave touch-control circuit according to the utility model preferred embodiment, its touch-control principle and self-lock mechanism and sinusoidal wave basic identical, difference is: behind the touch point TRI_TOUCH that touches triangle wave generating circuit, triangular wave touch-control circuit generation self-locking, simultaneously also can be so that the self-locking of square wave touch-control circuit, and triangular signal output TRI is transferred to signal output part OUT.
Fig. 5 shows the square wave and the triangular signal generation circuit of the utility model preferred embodiment, and its operation principle is as described below.This circuit adopts three not gates to produce square-wave signal, and triangular signal then is converted square-wave signal by a change-over circuit, and the not gate in the present embodiment adopts 4011B type NAND gate to finish.
During energising just, can select capacitance different capacitor C 4, C5, C6 are inserted this circuit.What suppose selection this moment is capacitor C 4, and the both end voltage of capacitor C 4 is zero.Not gate N4A output high level is to the input of not gate N5A, and output low level is to not gate N6A again for not gate N5A, and last not gate N6A exports high level.This high level makes the complete conducting of triode VT13, and triode VT15 ends.At this moment, triode VT14 conducting, voltage-stabiliser tube DW1 makes the voltage between the base stage of positive source line SQU_P and triode VT14 be stabilized in 3V, so just stablized the base current of triode VT14, power supply carries out constant current charge by triode VT14, potentiometer (getting final product the power transformation resistance) W1 and W2 to capacitor C 4.
When capacitor C 4 both end voltage reach the threshold voltage that can make not gate output counter-rotating, the voltage reversal of not gate N4A output becomes low level, be input to the input of not gate N5A, and not gate N5A exports high level to not gate N6A, last not gate N6A output low level, triode VT13 and VT14 are ended, and voltage stop capacitor C 4 chargings.But triode VT15 is but conducting at this moment, makes capacitor C 4 carry out constant-current discharge under the pressure stabilization function of voltage-stabiliser tube DW2.When capacitor C 4 discharges into the threshold voltage that makes not gate output generation counter-rotating, not gate N4A output reverses once more, cause not gate N5A and N6A also to reverse, the output of not gate N6A is inverted to high level once more, returns to the state of initial moment capacitor C 4 chargings.Go round and begin again thus, square-wave signal generation circuit produces vibration, and not gate N6A is output as square wave, can obtain triangular wave through capacitor C 4 (C5 or C6) two ends behind the change-over circuit.
The duty ratio that this signal generating circuit can also be regulated square wave and triangular wave by regulator potentiometer W1, W2, W3 (as fine setting), W4 (as coarse adjustment) can change square wave and triangle wave frequency by selecting different capacitor C 4, C5 and the C6 of capacitance.
Fig. 6 shows the operation principle of sine wave signal generation circuit in the utility model preferred embodiment.Particularly, this circuit adopts high input impedance type integrated transporting discharging CA3014.Capacitor C 7 (or C8, C9), resistance R 34, potentiometer W6, potentiometer W7, capacitor C 14 (or C15, C16), electric capacity R36, potentiometer W8, potentiometer W9 form frequency-selective network (capacitance of capacitor C 7, C8 and C9 equals the capacitance of capacitor C 14, C15 and C16 respectively) here.The combination of different electric capacity can be selected by frequency-changeover switch S1 and S2, all sinusoidal wave frequency can be changed such as the resistance sizes of one group of capacitor C 8 and C15 or another group capacitor C 9 and C16 or regulator potentiometer W6, W7, W8, W9.In addition, the resistance sizes of regulator potentiometer W5 can be regulated sinusoidal wave amplitude.
It can also be seen that from Fig. 6 constituted active leveling circuit by five diode D12～D16 and voltage-stabiliser tube DW3, this active leveling circuit is in parallel with feedback resistance R35, under the normal condition, this network is inoperative.When the amplitude of output signal increased to the puncture voltage of voltage-stabiliser tube DW3, voltage-stabiliser tube DW3 was breakdown, caused active leveling circuit to be started working, and made the total resistance of feedback branch descend, and feedback effect is strengthened, thereby amplitude is stablized.
Fig. 7 and Fig. 8 show the frequency of the utility model preferred embodiment and select principle, its basic principle is: when duplex single-pole double-throw switch (SPDT) S1 and S2 are in on-state shown in Figure 7, and make signal generator be in the operating state of square wave or triangular signal output, this moment, U_N did not receive SIN_N, relay J 5 and J6 do not work, capacitor C 4 is in parallel with C5, and LED 3 is bright, and this circuit can produce low frequency square wave and triangular signal; If pressing switch S 1 makes it be in another on-state, thereby disconnected capacitor C 4, had only in capacitor C 5 places in circuit, LED 3 and LED4 are bright, and this circuit can produce a medium frequency square wave and triangular signal; Make the both be in another on-state if press switch S 1 and S2 simultaneously, thereby make the electric capacity in the place in circuit change the less capacitor C of capacitance 6 into, LED 3, LED4 and LED5 three lamps are simultaneously bright, and this moment, this circuit can produce a square wave and a triangular signal that frequency is higher.
Number generator that the utility model preferred embodiment provides adopts very simple circuit design just can produce the signal of different wave such as sine wave, square wave and triangular wave, and is easy to operate, can adapt to the needs of different operating occasion well; This signal generator adopts novel touch control manner to change the type of signal, and the conversion output port, and the type of operating state that can display circuit, waveform, frequency etc., can greatly be user-friendly to; In addition, the protective circuit of this signal generator has also designed current-limiting function, can cut off the electricity supply automatically after breaking down so that can not damage signal generator, and can recover operate as normal after removing barriers, and has improved the security performance of circuit.
Certainly, those skilled in the art will recognize that, the above embodiments only play a part to explain to the utility model but not limit, if corresponding modify of the present utility model and distortion belong within the scope of the utility model claim and equivalent technologies thereof, intention then of the present utility model is also contained in these changes and the distortion.
Claims (8)
1. a signal generator comprises the power circuit that is used to provide power supply, it is characterized in that, described signal generator also comprises:
Be used for guaranteeing the protective circuit of described signal generator trouble free service, the input of described protective circuit is connected with the output of described power circuit;
Be used for producing the signal generating circuit of sine wave, square wave and triangular wave, described signal generating circuit is connected with described protective circuit;
Be used for the frequency adjustment circuit of conditioning signal frequency, described frequency adjustment circuit is connected with described signal generating circuit;
Be used for the output circuit of output signal, the input of described output circuit is connected with the output of described frequency adjustment circuit;
Be used for showing the indicating circuit of described signal generator operating state, the input of described indicating circuit is connected with the output of described power circuit, described protective circuit and described frequency generating circuit respectively; And
Be used for controlling with touch manner the touch-control circuit of described signal generating circuit operating state, the output of described touch-control circuit is connected with the input of described signal generating circuit, described frequency adjustment circuit and described output circuit respectively.
2. signal generator according to claim 1 is characterized in that described protective circuit comprises the diode that is used for preventing the reversal connection of described power circuit both positive and negative polarity.
3. signal generator according to claim 1 is characterized in that described indicating circuit comprises light-emitting diode.
4. signal generator according to claim 1 is characterized in that described touch-control circuit comprises the touch point that is used to respond to human body touch.
5. signal generator according to claim 1 is characterized in that, described touch-control circuit comprises 4011B type NAND gate.
6. signal generator according to claim 1 is characterized in that, described signal generating circuit comprises high input impedance type integrated transporting discharging CA3014.
7. signal generator according to claim 1 is characterized in that described signal generating circuit comprises the active leveling circuit of being made up of diode and voltage-stabiliser tube.
8. signal generator according to claim 1 is characterized in that described frequency adjustment circuit comprises the frequency-selective network of being made up of electric capacity, resistance and potentiometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200005512U CN201352782Y (en) | 2009-01-07 | 2009-01-07 | Signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200005512U CN201352782Y (en) | 2009-01-07 | 2009-01-07 | Signal generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201352782Y true CN201352782Y (en) | 2009-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200005512U Expired - Fee Related CN201352782Y (en) | 2009-01-07 | 2009-01-07 | Signal generator |
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| Country | Link |
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| CN (1) | CN201352782Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102662093A (en) * | 2012-06-03 | 2012-09-12 | 黄宇嵩 | Three-type waveform signal generator |
| CN103313524A (en) * | 2012-03-16 | 2013-09-18 | 联想(北京)有限公司 | Capacitor configuration method, electronic equipment and printed circuit board |
| CN104300912A (en) * | 2014-10-13 | 2015-01-21 | 中山市天键电声有限公司 | Simple waveform generator |
| CN110558935A (en) * | 2019-08-05 | 2019-12-13 | 南京阿尔法医学有限公司 | Front-end protection circuit and method of medical local anesthesia plane monitor |
-
2009
- 2009-01-07 CN CNU2009200005512U patent/CN201352782Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103313524A (en) * | 2012-03-16 | 2013-09-18 | 联想(北京)有限公司 | Capacitor configuration method, electronic equipment and printed circuit board |
| CN102662093A (en) * | 2012-06-03 | 2012-09-12 | 黄宇嵩 | Three-type waveform signal generator |
| CN104300912A (en) * | 2014-10-13 | 2015-01-21 | 中山市天键电声有限公司 | Simple waveform generator |
| CN104300912B (en) * | 2014-10-13 | 2017-06-20 | 中山市天键电声有限公司 | A kind of simple waveform generator |
| CN110558935A (en) * | 2019-08-05 | 2019-12-13 | 南京阿尔法医学有限公司 | Front-end protection circuit and method of medical local anesthesia plane monitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091125 Termination date: 20110107 |