JPS5830350U

JPS5830350U - Signal level display circuit

Info

Publication number: JPS5830350U
Application number: JP12402581U
Authority: JP
Inventors: 浩司三宅
Original assignee: 三洋電機株式会社
Priority date: 1981-08-20
Filing date: 1981-08-20
Publication date: 1983-02-28

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の信号レベル表示回路の結線図、第２図は
第１図のドライバ用集積回路の構成ブロック図、第３図
はこの考案の信号レベル表示回路の１実施例の結線図で
ある。ＣＣ・・・定電流回路、Ｄ１〜Ｄ６・・・第１ないし第
６レベル表示用発光ダイオード、Ｄ７・・・レンジ表示
用発光ダイオード、Ｄ８・・・整流用ダイオード、Ｉｎ
・・・信号入力端子、０Ｐａ−ＯＰｆ・・・第１ないし
第６表示用比較器、ＯＰｇ・・・レンジ切換用比較器、
Ｑ・・・トランジスタ、Ｒ５−Ｒ１１・・・第５ないし
第１１抵抗、＋　Ｖｃｃ・・・電源端子、ＺＤ２・・・
第２ツエナーダイオード。Figure 1 is a wiring diagram of a conventional signal level display circuit, Figure 2 is a block diagram of the driver integrated circuit shown in Figure 1, and Figure 3 is a wiring diagram of an embodiment of the signal level display circuit of this invention. be. CC...constant current circuit, D1-D6...light emitting diode for first to sixth level display, D7...light emitting diode for range display, D8...rectifier diode, In
...Signal input terminal, 0Pa-OPf...1st to 6th display comparator, OPg...range switching comparator,
Q...transistor, R5-R11...5th to 11th resistor, +Vcc...power supply terminal, ZD2...
Second Zener diode.

Claims

[Scope of utility model registration request]

Supplying current from a DC source to a series circuit of a plurality of resistors, and comparing the voltage of the input signal converted into DC by each of the plurality of display comparators with the voltage at the connection point of each of the resistors,
A signal level display circuit that controls lighting of each of a plurality of level display lighting elements by the output of each of the display comparators, and displays the level of the input signal by lighting each of the level display lighting elements. a range switching comparator that compares the voltage of the converted input signal with a set reference voltage; a transistor whose switching is controlled by the output of the comparator; and a transistor whose switching is controlled by the output of the comparator; a constant voltage diode that controls each level voltage, a diode that becomes conductive when the transistor is turned on and reduces the voltage at each connection point from the high level voltage to the low level voltage, and a range that lights up when the transistor is turned on. A signal level display circuit equipped with a display lighting element.