JPH0194704A - Oscillation circuit - Google Patents

Oscillation circuit

Info

Publication number
JPH0194704A
JPH0194704A JP25300687A JP25300687A JPH0194704A JP H0194704 A JPH0194704 A JP H0194704A JP 25300687 A JP25300687 A JP 25300687A JP 25300687 A JP25300687 A JP 25300687A JP H0194704 A JPH0194704 A JP H0194704A
Authority
JP
Japan
Prior art keywords
voltage
crystal oscillator
ptr1b
ptr1a
ntr
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
JP25300687A
Other languages
Japanese (ja)
Inventor
Masaki Furukoshi
Original Assignee
Seiko Epson 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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP25300687A priority Critical patent/JPH0194704A/en
Publication of JPH0194704A publication Critical patent/JPH0194704A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To extend a battery life by lowering the threshold voltage of an inverter amplifier to constitute a crystal oscillator and lowering it in accordance with the reduction of a battery voltage.
CONSTITUTION: A C-MOS type crystal oscillator is composed of an inverter amplifier 1, a crystal oscillator 6, capacitors 4 and 5, etc., which consist of P and N channel transistors (PTR,NTR)1a and 1b. A PTR group variable resistance 10 and an NTR group variable resistance 20 are connected between the source of the PTR1a and a high order side potential 100 and between the source of the PTR1b and a low order side potential 200. A voltage detecting input is connected to resistances 10 and 20 and the resistance value of the resistances 10 and 20 is changed accompanying the reduction of the battery voltage. Thus, the back gate bias of PTR1a and PTR1b is decreased, and an apparent threshold voltage is lowered. Consequently, the oscillation voltage is reduced and the battery life is extended.
COPYRIGHT: (C)1989,JPO&Japio
JP25300687A 1987-10-07 1987-10-07 Oscillation circuit Pending JPH0194704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25300687A JPH0194704A (en) 1987-10-07 1987-10-07 Oscillation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25300687A JPH0194704A (en) 1987-10-07 1987-10-07 Oscillation circuit

Publications (1)

Publication Number Publication Date
JPH0194704A true JPH0194704A (en) 1989-04-13

Family

ID=17245178

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25300687A Pending JPH0194704A (en) 1987-10-07 1987-10-07 Oscillation circuit

Country Status (1)

Country Link
JP (1) JPH0194704A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2711285A1 (en) * 1993-10-15 1995-04-21 Hewlett Packard Co Method and device for controlling the pulse rate of an oscillator
WO1999026334A1 (en) * 1997-11-14 1999-05-27 Seiko Epson Corporation Low-voltage oscillation amplifier circuit and portable electronic device comprising the same
US6097257A (en) * 1997-01-22 2000-08-01 Seiko Epson Corporation Crystal oscillator circuit having transistor with back gate voltage control
US8939112B2 (en) 2009-10-22 2015-01-27 Ihi Corporation Buckstay connecting system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2711285A1 (en) * 1993-10-15 1995-04-21 Hewlett Packard Co Method and device for controlling the pulse rate of an oscillator
US5481228A (en) * 1993-10-15 1996-01-02 Hewlett-Packard Corporation Method and apparatus for controlling oscillator duty cycle
US6097257A (en) * 1997-01-22 2000-08-01 Seiko Epson Corporation Crystal oscillator circuit having transistor with back gate voltage control
WO1999026334A1 (en) * 1997-11-14 1999-05-27 Seiko Epson Corporation Low-voltage oscillation amplifier circuit and portable electronic device comprising the same
US6229405B1 (en) 1997-11-14 2001-05-08 Seiko Epson Corporation Low-voltage oscillation amplifying circuit
US8939112B2 (en) 2009-10-22 2015-01-27 Ihi Corporation Buckstay connecting system

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