JPS5576958A - High frequency voltage detecting circuit - Google Patents

High frequency voltage detecting circuit

Info

Publication number
JPS5576958A
JPS5576958A JP15339778A JP15339778A JPS5576958A JP S5576958 A JPS5576958 A JP S5576958A JP 15339778 A JP15339778 A JP 15339778A JP 15339778 A JP15339778 A JP 15339778A JP S5576958 A JPS5576958 A JP S5576958A
Authority
JP
Japan
Prior art keywords
capacitor
voltage
transistor
high frequency
detecting circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15339778A
Other languages
Japanese (ja)
Inventor
Yoichi Moriya
Tadashi Fujino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15339778A priority Critical patent/JPS5576958A/en
Publication of JPS5576958A publication Critical patent/JPS5576958A/en
Pending legal-status Critical Current

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  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE: To enable ready adjustment of a time from the entrance and vanishment of an AC voltage to the generation and vanishment of an output signal in a high frequency voltage detecting circuit by providing a transistor conducting and shutting off by the voltage at a smoothing capacitor.
CONSTITUTION: First smoothing circuit is formed by resistors R1, R2 and a capacitor C, and second smoothing circuit is formed by resistors R3, R4 and a capacitor C1. The capacitor C1 is connected to a transistor (Tr) 12 at its base to control the operation of the transistor 12 by the voltage at the capacitor C1. When an AC voltage is applied to a termianl 1, the capacitor C1 is charged to thereby cut off the transistor 12, and the capacitor C is charged at the time constant of τ1'=R1C. When the AC voltage becomes zero volt, the transistor 12 is conducted to cause the capacitor C to dischrage at the time constant of τ2'=R2C(R1≫R2). Since the delay times τf, τr are set by the time constants τ1', τ2', it can be readily set τf>τr in case of R1≫R2.
COPYRIGHT: (C)1980,JPO&Japio
JP15339778A 1978-12-06 1978-12-06 High frequency voltage detecting circuit Pending JPS5576958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15339778A JPS5576958A (en) 1978-12-06 1978-12-06 High frequency voltage detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15339778A JPS5576958A (en) 1978-12-06 1978-12-06 High frequency voltage detecting circuit

Publications (1)

Publication Number Publication Date
JPS5576958A true JPS5576958A (en) 1980-06-10

Family

ID=15561592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15339778A Pending JPS5576958A (en) 1978-12-06 1978-12-06 High frequency voltage detecting circuit

Country Status (1)

Country Link
JP (1) JPS5576958A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6220380U (en) * 1985-07-22 1987-02-06
US8800995B2 (en) 2009-04-23 2014-08-12 Eagle Industry Co., Ltd. Mechanical seal device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6220380U (en) * 1985-07-22 1987-02-06
JPH0434457Y2 (en) * 1985-07-22 1992-08-17
US8800995B2 (en) 2009-04-23 2014-08-12 Eagle Industry Co., Ltd. Mechanical seal device

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