GB1547445A - Frequency comparator circuit - Google Patents

Frequency comparator circuit

Info

Publication number
GB1547445A
GB1547445A GB2170276A GB2170276A GB1547445A GB 1547445 A GB1547445 A GB 1547445A GB 2170276 A GB2170276 A GB 2170276A GB 2170276 A GB2170276 A GB 2170276A GB 1547445 A GB1547445 A GB 1547445A
Authority
GB
United Kingdom
Prior art keywords
comparator circuit
frequency comparator
frequency
circuit
comparator
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.)
Expired
Application number
GB2170276A
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of GB1547445A publication Critical patent/GB1547445A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
    • H03K5/26—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being duration, interval, position, frequency, or sequence
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/005—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing phase or frequency of 2 mutually independent oscillations in demodulators)

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Manipulation Of Pulses (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
GB2170276A 1975-08-25 1976-05-25 Frequency comparator circuit Expired GB1547445A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60772775A 1975-08-25 1975-08-25

Publications (1)

Publication Number Publication Date
GB1547445A true GB1547445A (en) 1979-06-20

Family

ID=24433467

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2170276A Expired GB1547445A (en) 1975-08-25 1976-05-25 Frequency comparator circuit

Country Status (4)

Country Link
JP (1) JPS5226876A (en)
CA (1) CA1058288A (en)
DE (1) DE2635892A1 (en)
GB (1) GB1547445A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109030937A (en) * 2018-08-13 2018-12-18 珠海格力电器股份有限公司 Power frequency detection circuit, air conditioner and grid-connected system

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5566701A (en) * 1978-06-26 1980-05-20 Mitsutoyo Mfg Co Ltd Count failure alarm circuit for digital electronic micrometer
JPS567480A (en) * 1979-06-29 1981-01-26 Mitsubishi Electric Corp Film transistor
JPS5788945U (en) * 1980-11-20 1982-06-01
JPH0691228B2 (en) * 1986-03-28 1994-11-14 キヤノン株式会社 Semiconductor device
US4849704A (en) * 1987-04-15 1989-07-18 Westinghouse Electric Corp. Duty cycle independent phase detector
JPS6411554U (en) * 1987-07-08 1989-01-20
US4801894A (en) * 1987-10-23 1989-01-31 Hewlett-Packard Company Frequency detector for frequency locked loop
JP2667432B2 (en) * 1988-03-19 1997-10-27 株式会社東芝 Semiconductor device and solid-state imaging device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4911374A (en) * 1972-06-01 1974-01-31

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109030937A (en) * 2018-08-13 2018-12-18 珠海格力电器股份有限公司 Power frequency detection circuit, air conditioner and grid-connected system
CN109030937B (en) * 2018-08-13 2024-02-06 珠海格力电器股份有限公司 Power frequency detection circuit, air conditioner and grid-connected system

Also Published As

Publication number Publication date
CA1058288A (en) 1979-07-10
JPS5226876A (en) 1977-02-28
DE2635892A1 (en) 1977-03-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee