JPH0425331U

JPH0425331U -

Info

Publication number: JPH0425331U
Application number: JP6692790U
Authority: JP
Priority date: 1990-06-25
Filing date: 1990-06-25
Publication date: 1992-02-28

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例のブロツク図、第２
図は本実施例における積分器の出力電圧波形図、
第３図は従来のアナログデジタルコンバータのブ
ロツク図、第４図は従来例の積分器の出力電圧波
形図である。１，１３……スイツチ、２，１４……積分器、
１１……被測定電圧、１２……基準電圧発生回路
、１５……コンパレータ、１６……制御ロジツク
回路、１７……カウンタ、１８……出力コード。 Fig. 1 is a block diagram of an embodiment of the present invention;
The figure shows the output voltage waveform diagram of the integrator in this example.
FIG. 3 is a block diagram of a conventional analog-to-digital converter, and FIG. 4 is an output voltage waveform diagram of a conventional integrator. 1, 13... switch, 2, 14... integrator,
11... Voltage to be measured, 12... Reference voltage generation circuit, 15... Comparator, 16... Control logic circuit, 17... Counter, 18... Output code.

Claims

[Scope of utility model registration request]

a reference voltage generation circuit that outputs a constant reference voltage; a first integrator that integrates the reference voltage; a second integrator that integrates the voltage to be measured; and outputs of the first and second integrators. A comparator that compares voltages, a counter that converts the voltage into a digital quantity under the control of the comparator, a control logic circuit that controls the start and end of analog-to-digital conversion, and a control signal of the control logic circuit that converts the reference voltage into a digital quantity. A first switch that connects or disconnects the supply of the voltage to be measured to the second integrator, and a second switch that connects or disconnects the supply of the voltage to be measured to the second integrator by the same control signal of the control logic circuit. An analog-to-digital converter characterized by having two switches.