JPS5533308A - Frequency comparator circuit - Google Patents

Frequency comparator circuit

Info

Publication number
JPS5533308A
JPS5533308A JP10483978A JP10483978A JPS5533308A JP S5533308 A JPS5533308 A JP S5533308A JP 10483978 A JP10483978 A JP 10483978A JP 10483978 A JP10483978 A JP 10483978A JP S5533308 A JPS5533308 A JP S5533308A
Authority
JP
Japan
Prior art keywords
circuit
output
count value
signal
terminal
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
JP10483978A
Other languages
Japanese (ja)
Other versions
JPS5912216B2 (en
Inventor
Akio Kawazoe
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP53104839A priority Critical patent/JPS5912216B2/en
Publication of JPS5533308A publication Critical patent/JPS5533308A/en
Publication of JPS5912216B2 publication Critical patent/JPS5912216B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Manipulation Of Pulses (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE: To enhance both the comparison accuracy and the stability by securing the free selection for the hysteresis properties through combinations of plural bit output of the counter circuit.
CONSTITUTION: Comparator circuit consists of input terminal 1, input AND gate circuit 2, binary up-counter circuit 3, decoder circuit 4, FF circuit 5 and others. Output part Q of circuit 5 is connected to AND logic circuit 9 forming circuit 4 in order to set the upper limit pulse count value for output terminal 8 of circuit 14 and the hysteresis properties of the same circuit. And reverse output part Q of circuit 5 is connected to logic circuit 10 of circuit 4 in order to set the lower limit count value. With supply of signal "H" to reset terminal 7, part Q turns to "L". On the other hand, circuit 9 receives supply of output parts Q5 and Q7 of weight 16 and 64, that is, the signal equivalent to pulse count value 80 from the output composed of 7 bits of circuir 3. At the same time part Q features "H", and circuit 10 receives supply of output bit weight 32 and 64, that is, the signal of count value 96.
COPYRIGHT: (C)1980,JPO&Japio
JP53104839A 1978-08-30 1978-08-30 frequency comparison circuit Expired JPS5912216B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53104839A JPS5912216B2 (en) 1978-08-30 1978-08-30 frequency comparison circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53104839A JPS5912216B2 (en) 1978-08-30 1978-08-30 frequency comparison circuit

Publications (2)

Publication Number Publication Date
JPS5533308A true JPS5533308A (en) 1980-03-08
JPS5912216B2 JPS5912216B2 (en) 1984-03-21

Family

ID=14391509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53104839A Expired JPS5912216B2 (en) 1978-08-30 1978-08-30 frequency comparison circuit

Country Status (1)

Country Link
JP (1) JPS5912216B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58123227A (en) * 1982-01-18 1983-07-22 Fujitsu Ltd Signal detecting circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58123227A (en) * 1982-01-18 1983-07-22 Fujitsu Ltd Signal detecting circuit

Also Published As

Publication number Publication date
JPS5912216B2 (en) 1984-03-21

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