JPS5511684A - Crystal oscillation circuit - Google Patents

Crystal oscillation circuit

Info

Publication number
JPS5511684A
JPS5511684A JP8551978A JP8551978A JPS5511684A JP S5511684 A JPS5511684 A JP S5511684A JP 8551978 A JP8551978 A JP 8551978A JP 8551978 A JP8551978 A JP 8551978A JP S5511684 A JPS5511684 A JP S5511684A
Authority
JP
Japan
Prior art keywords
pulse
output
amplifier
higher harmonic
value
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
JP8551978A
Other languages
Japanese (ja)
Inventor
Noboru Shoji
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8551978A priority Critical patent/JPS5511684A/en
Publication of JPS5511684A publication Critical patent/JPS5511684A/en
Pending legal-status Critical Current

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  • Oscillators With Electromechanical Resonators (AREA)

Abstract

PURPOSE: To reduce the undesired oscillations with the higher harmonic waves by forming the pulse featuring the duty factor of the value excepting 1/2 from the output of the amplifier and then supplying this pulse to the amplifier via the feedback circuit including the crystal oscillator.
CONSTITUTION: The odd-order higher harmonic wave of the rectangular wave pulse featuring cycle Tc and pulse duration Tw can be minimized by setting the duty factor of the pulse to the fixed value excepting 1/2. Then the output of amplifier 1 is supplied to pulse formation circuit 4. In circuit 4 pulse duration Tw is adjusted through the delay circuit, AND gate and others, and duty factor DF is set to the value excepting 1/2. And this output drives crystal oscillator 2, and the output is fed back to the input of amplifier 1. Then the oscillation output is drawn out through terminal OUT. Thus, factor DF is set to the fixed value in order to attenuate greatly the odd-order higher harmonic wave according to the set value of DF. For instance, if DF is set to 1/3 or 2/3, the teritary higher harmonic wave can be minimized.
COPYRIGHT: (C)1980,JPO&Japio
JP8551978A 1978-07-12 1978-07-12 Crystal oscillation circuit Pending JPS5511684A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8551978A JPS5511684A (en) 1978-07-12 1978-07-12 Crystal oscillation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8551978A JPS5511684A (en) 1978-07-12 1978-07-12 Crystal oscillation circuit

Publications (1)

Publication Number Publication Date
JPS5511684A true JPS5511684A (en) 1980-01-26

Family

ID=13861148

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8551978A Pending JPS5511684A (en) 1978-07-12 1978-07-12 Crystal oscillation circuit

Country Status (1)

Country Link
JP (1) JPS5511684A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4514551A (en) * 1983-01-24 1985-04-30 Nitto Chemical Industry Co., Ltd. Process for the preparation of cationic polymers
JPS63119305A (en) * 1986-10-23 1988-05-24 Sony Tektronix Corp Oscillator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4514551A (en) * 1983-01-24 1985-04-30 Nitto Chemical Industry Co., Ltd. Process for the preparation of cationic polymers
JPS63119305A (en) * 1986-10-23 1988-05-24 Sony Tektronix Corp Oscillator

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