Switch arrangement for V{HD BE {B compensation of push-pull amplifiers专利检索-D类放大器电子零件及设备专利检索查询-专利查询网

Switch arrangement for V{HD BE {B compensation of push-pull amplifiers

阅读：877发布：2022-08-29

专利汇可以提供Switch arrangement for V{HD BE {B compensation of push-pull amplifiers专利检索，专利查询，专利分析的服务。并且Improvement in intermodulation damping and voltage compensation of the switching transistors in a class AB push-pull amplifier is obtained through the use of a compensation transistor whose collector and emitter electrodes are coupled across the poles of the amplifier d.c. source through respective collector and emitter resistors and whose base electrode is coupled to the secondary winding centertap of the input transformer. A zener diode is coupled between base and collector electrodes of the compensation transistor to render current from the d.c. source flowing through the collector resistance substantially constant and independent of temperature. The output transistors and the base electrode of the compensation transistor are all coupled to a common capacitor for thermal coupling purposes.，下面是Switch arrangement for V{HD BE {B compensation of push-pull amplifiers专利的具体信息内容。

权利要求

1. In a push-pull amplifier comprised of a drive transformer, an output transformer, and first and second transistors, the input winding of the drive transformer receiving the signal to be amplified, the output winding of the drive transformer having its opposite terminals coupled to the base electrodes of the first and second transistors respectively and having a center tap, a feed voltage source having one of its poles coupled to the center tap through a capacitor, the emitters of said first and second transistors each being coupled through respective first and second resistances to said one pole of the feed voltage and the collectors of said first and second transistors being coupled to the opposite terminals of the output transformer primary winding whose center tap is coupled to the remaining pole of the feed voltage and whose secondary winding is coupled to the load means, the improvement comprising: a compensation transistor whose base and emitter electrodes are respectively coupled to the drive transformer secondary winding center tap and a common terminal, the emitters of said first and second transistors each being connected to said common terminal, the emitter and collector electrodes of said third transistor being respectively coupled to the opposite poles of the feed voltage through collector and emitter resistors.

2. The apparatus of claim 1 further comprising a Zener diode coupled between the collector and base electrodes of said third transistor to provide a strong negative direct current feedback therebetween.

3. The apparatus of claim 2 wherein the value of the collector resistance and the Zener diode are selected to make the collector current of said third transistor substantially equal to the collector current of the first and second transistors when said first and second transistors are conducting.

4. The apparatus of claim 1 wherein the base electrode of the third transistor is coupled to said capacitor to provide good thermal coupling.

5. The apparatus of claim 1 wherein third and fourth resistances have their first end terminals respectively coupled to the emitter electrodes of said first and second transistors and have their opposite end terminals connected to said common terminal.

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Switch arrangement for V{HD BE {B compensation of push-pull amplifiers

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