[go: up one dir, main page]

JPS54141176A - Discriminating method of commercial frequencies - Google Patents

Discriminating method of commercial frequencies

Info

Publication number
JPS54141176A
JPS54141176A JP4879778A JP4879778A JPS54141176A JP S54141176 A JPS54141176 A JP S54141176A JP 4879778 A JP4879778 A JP 4879778A JP 4879778 A JP4879778 A JP 4879778A JP S54141176 A JPS54141176 A JP S54141176A
Authority
JP
Japan
Prior art keywords
circuit
counting
comparing
normal value
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
JP4879778A
Other languages
Japanese (ja)
Inventor
Toshio Kakizawa
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4879778A priority Critical patent/JPS54141176A/en
Publication of JPS54141176A publication Critical patent/JPS54141176A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

PURPOSE: To discriminate commercial frequencies by comparing the count value of the other counter circuit when the counter circuit which was used as a timer attains the specified time and the normal value of a normal value register in a comparing- discriminating circuit.
CONSTITUTION: A counting-comparing circuit 22 starts counting the oscillation outputs of an oscillator 23 and stops counting when the count value thereof reaches a fixed value of a fixed value register provided in the counting-comparing circuit 22. A counter circuit 17, too, continues counting the square wave outputs of a square wave output circuit 16 and stops counting when the counting-comparing circuit 22 ends counting of the oscillation outputs of the oscillator 23. The count value of this counter circuit 17 and the normal value of the normal value register provided to the comparing-discriminating circuit 24 are compared in this comparing- discriminating circuit 24 and if the count value of the counter circuit 17 is smaller than the normal value of the normal value register, the signal of + is outputted in a time base circuit 25 and if it is larger, the signal of - is outputted.
COPYRIGHT: (C)1979,JPO&Japio
JP4879778A 1978-04-26 1978-04-26 Discriminating method of commercial frequencies Pending JPS54141176A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4879778A JPS54141176A (en) 1978-04-26 1978-04-26 Discriminating method of commercial frequencies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4879778A JPS54141176A (en) 1978-04-26 1978-04-26 Discriminating method of commercial frequencies

Publications (1)

Publication Number Publication Date
JPS54141176A true JPS54141176A (en) 1979-11-02

Family

ID=12813211

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4879778A Pending JPS54141176A (en) 1978-04-26 1978-04-26 Discriminating method of commercial frequencies

Country Status (1)

Country Link
JP (1) JPS54141176A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57200867A (en) * 1981-06-04 1982-12-09 Matsushita Electric Ind Co Ltd Detector for frequency and phase
JPS603562A (en) * 1983-06-20 1985-01-09 Matsushita Electric Ind Co Ltd Commercial power souce frequency discriminating device
JPS62134567A (en) * 1985-12-09 1987-06-17 Matsushita Electric Ind Co Ltd Apparatus for discriminating frequency of power source

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57200867A (en) * 1981-06-04 1982-12-09 Matsushita Electric Ind Co Ltd Detector for frequency and phase
JPS603562A (en) * 1983-06-20 1985-01-09 Matsushita Electric Ind Co Ltd Commercial power souce frequency discriminating device
JPS62134567A (en) * 1985-12-09 1987-06-17 Matsushita Electric Ind Co Ltd Apparatus for discriminating frequency of power source

Similar Documents

Publication Publication Date Title
JPS54141176A (en) Discriminating method of commercial frequencies
JPS524143A (en) Digital filter
JPS53113462A (en) Frequency discriminator
JPS56100525A (en) Electronic timer circuit
JPS57578A (en) Electronic timepiece
JPS551703A (en) Programmable pulse generator
JPS5253467A (en) Electronic watch with alarm
JPS5318942A (en) Frequency multiplication circuit
JPS55116028A (en) Cooking device
JPS5557177A (en) Digital timer
JPS5644889A (en) Analog electronic clock equipped with alarm having timer function
JPS5344070A (en) Measuring method for constant of mechanical oscillator
JPS535901A (en) Driving device of tuning indication meter
JPS51151002A (en) Receiver unit
JPS5520476A (en) Digital electronic watch
JPS5220075A (en) Temperature measurement device
JPS5292326A (en) Inverter
JPS5364597A (en) Coin detector
JPS5682457A (en) Frequency detector
JPS52125204A (en) Tuning indication circuit
JPS55108023A (en) Clock circuit
JPS54136102A (en) Electronic tuning type receiver
JPS52106444A (en) Phase discriminating circuit
JPS5589789A (en) Electronic watch
JPS5337334A (en) Display unit