GB842219A - Improvements in or relating to transistor circuits - Google Patents
Improvements in or relating to transistor circuitsInfo
- Publication number
- GB842219A GB842219A GB26354/57A GB2635457A GB842219A GB 842219 A GB842219 A GB 842219A GB 26354/57 A GB26354/57 A GB 26354/57A GB 2635457 A GB2635457 A GB 2635457A GB 842219 A GB842219 A GB 842219A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistors
- choke
- winding
- current
- centre
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5383—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1206—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification
- H03B5/1218—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification the generator being of the balanced type
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1231—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more bipolar transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1296—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the feedback circuit comprising a transformer
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Amplifiers (AREA)
Abstract
842,219. Transistor oscillating and amplifying circuits. COLE Ltd., E. K., COX, V. J., and YARROW, C. J. Nov. 20, 1958 [Aug. 21, 1957], No. 26354/57. Class 40(6). A transistor circuit which develops a sinusoidal oscillation across the winding of a tuned transformer, either by selfoscillation or on the application of an input signal of suitable amplitude and frequency thereto, comprises a pair of alternately-conducting transistors each conducting in alternate half-cycles of the sinusoidal oscillation and so connected that the current supplying the transistors flows in alternate half-cycles in opposite directions through a tuned winding of the transformer, a choke coil being provided and so connected that the said current flows in the same direction therethrough in alternate halfcycles. The transistors are alternately in a non-conducting and bottomed condition; the choke ensures that switching from one condition to the other occurs at instants when the current through the conducting transistor has fallen to zero. In a first embodiment illustrated in the drawing accompanying the Provisional Specification, a selfoscillatory circuit comprises a transformer having a centre-tapped tuned winding W 1 connected between the collector electrodes of transistors A, B. The direct-current supply to the transistor is connected to the centre tap of winding W1 through a series choke L. A resistor R is connected from the same terminal of the power supply to the centre-tap of feedback winding W2. the value of the resistor being such as to permit sufficient base current to flow therethrough to ensure that one of the transistors is. always bottomed. In a second embodiment, Fig. 1, the choke Ll is connected as shown between alternately conducting transistors T1, T2. The tuned winding Wl is connected between a centre-tap on the choke L1 and a centre-tap on the power supply, or, as shown, to a capacitor C2 across which is developed a voltage equal to half that of the power supply. The circuits of feedback windings W2, W3 are coupled together by a bifilar choke L2 which acts to maintain the sum of the baseelectrode currents flowing constant and assists the change-over from one transistor to the other. In a further embodiment, Fig. 2, the sum of the voltages across windings Wl and W3 equals the voltage across W2. The coupling between the feedback circuits of the two transistors which maintains the sum of the base currents equal is provided by capacitor C3. In a final embodiment, Fig. 3, transistors Tl and T4 conduct simultaneously and in alternation with transistors T2 and T3. Thus the current path between the supply terminals and including choke L1 is completed in alternate half-cycles through transistors Tl and T4 and through transistors T2 and T3 respectively, current flowing through the winding W1 in different directions in the two cases. Bifilar choke L3 maintains the sum of the base currents in transistors T3 and T4 constant while choke L2 performs the same function for transistors Tl and T2. The circuits described above may all be modified so as to be externally driven, the feedback windings being replaced by windings on a transformer supplied from an alternating-current source of appropriate amplitude and frequency.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB26354/57A GB842219A (en) | 1957-08-21 | 1957-08-21 | Improvements in or relating to transistor circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB26354/57A GB842219A (en) | 1957-08-21 | 1957-08-21 | Improvements in or relating to transistor circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB842219A true GB842219A (en) | 1960-07-20 |
Family
ID=10242361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26354/57A Expired GB842219A (en) | 1957-08-21 | 1957-08-21 | Improvements in or relating to transistor circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB842219A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3183412A (en) * | 1961-01-25 | 1965-05-11 | Electrologica Nv | Switching device for impedances with inductive character |
US3211963A (en) * | 1961-12-28 | 1965-10-12 | Motorola Inc | Semiconductor switching circuit |
EP3202031A4 (en) * | 2014-10-03 | 2018-06-20 | Zaretsky, Howard | Switching current source radio frequency oscillator |
EP2795790B1 (en) * | 2011-12-19 | 2020-06-03 | Intel Corporation | Voltage-controlled oscillator with reduced single-ended capacitance |
-
1957
- 1957-08-21 GB GB26354/57A patent/GB842219A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3183412A (en) * | 1961-01-25 | 1965-05-11 | Electrologica Nv | Switching device for impedances with inductive character |
US3211963A (en) * | 1961-12-28 | 1965-10-12 | Motorola Inc | Semiconductor switching circuit |
EP2795790B1 (en) * | 2011-12-19 | 2020-06-03 | Intel Corporation | Voltage-controlled oscillator with reduced single-ended capacitance |
EP3202031A4 (en) * | 2014-10-03 | 2018-06-20 | Zaretsky, Howard | Switching current source radio frequency oscillator |
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