JPS59106228U

JPS59106228U - A/D converter output guarantee circuit

Info

Publication number: JPS59106228U
Application number: JP20212282U
Authority: JP
Inventors: 貴志　治夫
Original assignee: 株式会社島津製作所
Priority date: 1982-12-29
Filing date: 1982-12-29
Publication date: 1984-07-17

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例のブロック図、第２図は同
実施例の動作を説明するためのタイムチャートである。１・・・Ａ／Ｄコンバータ、２・・・アナログ信号源、
３・・・切換回路、４・・・基準電圧源、５・・・ディ
ジタルコンパレータ、６川ビツトパタ一ン発生回路、７
・・・パワーオン信号回路、８・・・制御回路。FIG. 1 is a block diagram of an embodiment of this invention, and FIG. 2 is a time chart for explaining the operation of the embodiment. 1...A/D converter, 2...analog signal source,
3...Switching circuit, 4...Reference voltage source, 5...Digital comparator, 6-way bit pattern generation circuit, 7
...Power-on signal circuit, 8...Control circuit.

Claims

[Scope of utility model registration request]

In an A/D converter that converts an analog signal input from an analog signal source into a digital signal, the A/D converter is inserted into a reference voltage source and the input circuit of the A/D converter, and
a switching circuit for switching the human power of the A/D converter to the analog signal source to be converted or the reference voltage source;
a digital comparator that compares the digital signal from the converter with the bit pattern corresponding to the reference voltage and generates a match signal when they match; and a digital comparator that operates to control the switching circuit when the power is turned on, Switching the input of the /D converter from the analog signal source to be converted to the reference voltage source, and then switching the switching circuit back from the reference voltage source to the analog signal source in response to the occurrence of a match signal from the digital comparator, as well as the subsequent circuit. An output guarantee circuit for an A/D converter, comprising: a control circuit that sends a guarantee signal to an A/D converter;