JPS6486708A - Oscillating circuit - Google Patents

Oscillating circuit

Info

Publication number
JPS6486708A
JPS6486708A JP62244931A JP24493187A JPS6486708A JP S6486708 A JPS6486708 A JP S6486708A JP 62244931 A JP62244931 A JP 62244931A JP 24493187 A JP24493187 A JP 24493187A JP S6486708 A JPS6486708 A JP S6486708A
Authority
JP
Japan
Prior art keywords
time constant
time
integrating
circuit
output
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
JP62244931A
Other languages
Japanese (ja)
Inventor
Shuji Kaneuchi
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
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 filed Critical NEC Corp
Priority to JP62244931A priority Critical patent/JPS6486708A/en
Publication of JPS6486708A publication Critical patent/JPS6486708A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To correct the oscillation frequency after production by using a time constant switching means to set the time constant of an integrating circuit connected between inverters based on information of the time constant stored and held in a storage means. CONSTITUTION:When transfer control signals S1-S4 and the inverse of S1-S4 are inputted to TRSs 21-24 of integrating circuits 5, 6, and 7, resistance values and capacity values of integrating circuits 5, 6, and 7 are determined and time constants are determined. Meanwhile, the output of an inverter 1 is delayed by a time based on the time constant of the integrating circuit 5 and is outputted from an inverter 2 and is delayed furthermore by a time based on the time constant of the integrating circuit 6. The output of the circuit 6 is delayed furthermore by a time based on the time constant of the integrating circuit 7 and is outputted from inverters 1 and 4. Consequently, the output of a clock output terminal 8 is a clock signal having the frequency determined by the numbers of stages of inverters and integrating circuits and time constants of integrating circuits. Information written in the memory cell of a time constant control circuit is changed to adjust the oscillation frequency of an oscillating circuit.
JP62244931A 1987-09-29 1987-09-29 Oscillating circuit Pending JPS6486708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62244931A JPS6486708A (en) 1987-09-29 1987-09-29 Oscillating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62244931A JPS6486708A (en) 1987-09-29 1987-09-29 Oscillating circuit

Publications (1)

Publication Number Publication Date
JPS6486708A true JPS6486708A (en) 1989-03-31

Family

ID=17126096

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62244931A Pending JPS6486708A (en) 1987-09-29 1987-09-29 Oscillating circuit

Country Status (1)

Country Link
JP (1) JPS6486708A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02235428A (en) * 1989-03-09 1990-09-18 Ricoh Co Ltd Voltage controlled oscillator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60226021A (en) * 1984-04-25 1985-11-11 Atsushi Kitamura Magnetic recording medium
JPS62107A (en) * 1985-06-26 1987-01-06 Mitsubishi Electric Corp Semiconductor device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60226021A (en) * 1984-04-25 1985-11-11 Atsushi Kitamura Magnetic recording medium
JPS62107A (en) * 1985-06-26 1987-01-06 Mitsubishi Electric Corp Semiconductor device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02235428A (en) * 1989-03-09 1990-09-18 Ricoh Co Ltd Voltage controlled oscillator

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