Output stage quick response circuit and response method thereof

Abstract

The present invention discloses a fast response circuit of an output stage, said circuit comprising: an input stage, an output stage, a driver stage, and an acceleration stage; the acceleration stage is connected with the driver stage to reduce the rising edge of the output signal of the output stage time, falling edge time; the acceleration stage presets a preset amount of current, and when the second transistor MN1 of the output stage needs to be turned on, the preset current quickly flows into the second transistor MN1, thereby speeding up the turn-on time of the second transistor MN1 , reduce the falling edge time of the output signal; when the second transistor MN1 of the output stage needs to change from the on state to the off state, the acceleration stage quickly extracts excess carriers from the base of the second transistor MN1 of the output stage, accelerating state transition, reducing the rising edge time of the output signal. The output stage fast response circuit and its response method proposed by the invention can solve the problem that the rising edge time and falling edge time of the output stage signal in the analog integrated circuit are too long.

Description

technical field [0001] The invention belongs to the technical field of analog integrated circuit design, and relates to a quick response circuit, in particular to an output stage quick response circuit; meanwhile, the invention also relates to a quick response method of the output stage quick response circuit. Background technique [0002] The switching speed of the integrated circuit is a key parameter, which directly affects the operating frequency of the circuit. More importantly, to obtain a square wave close to the ideal, it is necessary to minimize the rising edge time and falling edge time. The rising and falling edge times reflected in the circuit are the times when a transistor transitions from the on state to the off state or from the off state to the on state. According to semiconductor physics and transistor principles, the transition of a transistor from an on state to an off state, and from an off state to an on state is a process of carrier flow, which takes a...

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Problems solved by technology

However, this circuit structure does not help the turn-off time of the output transistor, that is, it cannot reduce the rising edge time of the output signal of the output stage.

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