Totem pole circuit

Abstract

The present invention discloses a totem-pole circuit. The totem-pole circuit comprises a triode Q1, a triode Q2, a diode D1 and a diode D2, wherein the triode Q1 and the diode Q2 are of an NPN type. The collector electrode of the triode Q1 is connected with an input voltage Vin, the input voltage Vin is connected with the base electrode of the triode Q1 through a resistor R1, the base electrode ofthe triode Q1 is connected with the collector electrode of the triode Q2 through a diode D2, and the emitter electrode of the triode Q1 is connected with the collector electrode of the triode Q2 through a diode D1. The base electrode of the triode Q2 inputs a driving pulse signal PWM, the emitter electrode is grounded, and the collector electrode is connected with the driving output end. The circuit provided by the invention has more stable circuit performance in a high-temperature environment, and also has a reverse output function.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a totem pole circuit. Background technique [0002] At present, the existing totem pole circuit is usually composed of NPN transistors and PNP transistors, refer to figure 1 As shown, the emitter of the NPN transistor is connected to the collector of the PNP transistor, and the base of the NPN transistor is connected to the base of the PNP transistor to form a totem pole circuit. This circuit utilizes the interaction between the NPN transistor and the PNP transistor Turning on can get high level and low level. When the input is high level, the NPN type transistor is turned on, the PNP type transistor is turned off, and the output terminal is high level; similarly, when the input is low level, the output is also low level. . [0003] However, since the temperature characteristics of the NPN transistor and the PNP transistor are different, the output waveform may beco...

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Problems solved by technology

[0003] However, due to the different temperature characteristics of the NPN transistor and the PNP transistor, the output waveform may become unstable in a high temperature environment.

[0004] Second, refer to figure 2 As shown, in the case of a relatively high input voltage, the conventional totem pole circuit needs to be connected with a driving circuit outside the NPN transistor and the PNP transistor to drive the NPN transistor and the PNP transistor respectively, so that the conventional totem pole circuit The driving circuit of the column circuit is more complicated

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