Negative voltage converter

Abstract

A negative voltage converter includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor and a sixth transistor. The first terminal and the control terminal of the first transistor are coupled to the signal input terminal. The first terminal of the second transistor is coupled to the signal input terminal, and the control terminal is coupled to the first clock signal and the second terminal of the first transistor. The first end of the third transistor is coupled to the signal input end, and the control end is coupled to the second clock signal and the second end of the second transistor. The first terminal of the fourth transistor is coupled to the second terminal of the third transistor, and the control terminal is coupled to the second terminal of the third transistor. The first terminal of the fifth transistor is coupled to the second terminal of the third transistor, and the control terminal is coupled to the second terminal of the fourth transistor. The first terminal of the sixth transistor is coupled to the second terminal of the third transistor, the second terminal of the sixth transistor is coupled to the signal output terminal, and the control terminal is coupled to the second terminal of the fifth transistor and the first clock signal .

Description

technical field [0001] The invention relates to a negative voltage converter, in particular to a negative voltage converter (Negative voltage converter) composed of a P-type transistor (PMOSFET or P-type Thin Film Transistor). Background technique [0002] refer to figure 1 as well as figure 2 , figure 1 It is a circuit diagram of a negative voltage converter 10 composed of P-type transistors in the prior art, figure 1 The negative voltage converter 10 has a node X. figure 2 This is a case where the voltage of the node X changes as the threshold voltage Vth voltage of the transistor 16 changes. The negative voltage converter 10 is composed of P-type transistors (PMOS or PTFT), and its purpose is to convert the input positive voltage or 0V supply power into the negative DC supply voltage required by circuits or components. The negative voltage converter 10 includes a voltage input circuit 12 and a voltage amplifying circuit 14 . The voltage input circuit 12 includes a...

AI Technical Summary

Problems solved by technology

In this way, the difference in the output voltage of the entire negative voltage converter 10 will be amplified to 9V, which will directly affect the operation of subsequent circuits and components.

This problem will not only increase the difficulty of circuit design, but also increase the variation of operation, and will seriously affect the product yield.

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