JPS57203338A - Oscillating device - Google Patents

Oscillating device

Info

Publication number
JPS57203338A
JPS57203338A JP56088986A JP8898681A JPS57203338A JP S57203338 A JPS57203338 A JP S57203338A JP 56088986 A JP56088986 A JP 56088986A JP 8898681 A JP8898681 A JP 8898681A JP S57203338 A JPS57203338 A JP S57203338A
Authority
JP
Japan
Prior art keywords
signal
oscillator
clock
detects
rise
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.)
Granted
Application number
JP56088986A
Other languages
Japanese (ja)
Other versions
JPH0230210B2 (en
Inventor
Yutaka Hayashi
Osamu Kondo
Akinori Tojo
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 JP56088986A priority Critical patent/JPS57203338A/en
Publication of JPS57203338A publication Critical patent/JPS57203338A/en
Publication of JPH0230210B2 publication Critical patent/JPH0230210B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation

Landscapes

  • Oscillators With Electromechanical Resonators (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To prevent the output of a clock signal when an oscillation is unstable, by controlling the generation of the clock signal from an oscillator by means of a detecting circuit that detects both the rise and fall of an external input signal and then driving a microprocessor. CONSTITUTION:An oscillator 2 has the oscillation with the driving of a quartz oscillator 1 and generates a clock signal 11 having a prescribed frequency necessary for a microprocessor 10. At the same time, the oscillator 2 receives the clock start signal from a rise detecting circuit 4 that detects the rise of an external input signal and then starts the generation of the signal 11. After this, a transmission control circuit 8 supplies the signal 11 given from the oscillator 2 to the processor 10 in the form of a working clock signal 9 for a period during which a clock supply signal 7 is fed from a fall detecting circuit 5 that detects the fall of the external input.
JP56088986A 1981-06-10 1981-06-10 Oscillating device Granted JPS57203338A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56088986A JPS57203338A (en) 1981-06-10 1981-06-10 Oscillating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56088986A JPS57203338A (en) 1981-06-10 1981-06-10 Oscillating device

Publications (2)

Publication Number Publication Date
JPS57203338A true JPS57203338A (en) 1982-12-13
JPH0230210B2 JPH0230210B2 (en) 1990-07-05

Family

ID=13958117

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56088986A Granted JPS57203338A (en) 1981-06-10 1981-06-10 Oscillating device

Country Status (1)

Country Link
JP (1) JPS57203338A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5176066A (en) * 1974-12-26 1976-07-01 Omron Tateisi Electronics Co
JPS52143744A (en) * 1976-05-26 1977-11-30 Hitachi Ltd Pulse operation circuit
JPS5662428A (en) * 1979-10-29 1981-05-28 Nec Corp Oscillator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5176066A (en) * 1974-12-26 1976-07-01 Omron Tateisi Electronics Co
JPS52143744A (en) * 1976-05-26 1977-11-30 Hitachi Ltd Pulse operation circuit
JPS5662428A (en) * 1979-10-29 1981-05-28 Nec Corp Oscillator

Also Published As

Publication number Publication date
JPH0230210B2 (en) 1990-07-05

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