GB1380140A - Electronic measuring circuits - Google Patents

Electronic measuring circuits

Info

Publication number
GB1380140A
GB1380140A GB1272572A GB1272572A GB1380140A GB 1380140 A GB1380140 A GB 1380140A GB 1272572 A GB1272572 A GB 1272572A GB 1272572 A GB1272572 A GB 1272572A GB 1380140 A GB1380140 A GB 1380140A
Authority
GB
United Kingdom
Prior art keywords
input
frequency
operational amplifier
half cycle
signal
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
GB1272572A
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.)
Bull HN Information Systems Italia SpA
Bull HN Information Systems Inc
Original Assignee
Honeywell Information Systems Italia SpA
Honeywell Information Systems Inc
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 Honeywell Information Systems Italia SpA, Honeywell Information Systems Inc filed Critical Honeywell Information Systems Italia SpA
Publication of GB1380140A publication Critical patent/GB1380140A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/06—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage
    • G01R23/09—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage using analogue integrators, e.g. capacitors establishing a mean value by balance of input signals and defined discharge signals or leakage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
    • H03K9/06—Demodulating pulses which have been modulated with a continuously-variable signal of frequency- or rate-modulated pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

1380140 Frequency measurements HONEYWELL INFORMATION SYSTEMS Inc 17 March 1972 [7 June 1971] 12725/72 Heading H3A A circuit for measuring the frequency of alternating current signals 201 comprises a charging source 100, a first controlled switch 101 for connecting the source 100 to a first storage element 102 during a half cycle of signal 201, a second controlled switch 103 conductive during the alternate half cycle and a device 23, e.g. an operational amplifier, effective to transfer all the charge stored in element 102 to a second storage element 25 associated with a discharge resistor 24. The input A.C. signal 201 is squared at 202 and applied directly to the FET switch 101 and via an inverter 204 to the FET switch 102. The operational amplifier 23 drives a current through capacitor 25 as to reduce the potential at input 21 to zero. The average output voltage developed at terminal 27 is proportional to the input frequency.
GB1272572A 1971-06-07 1972-03-17 Electronic measuring circuits Expired GB1380140A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15032471A 1971-06-07 1971-06-07

Publications (1)

Publication Number Publication Date
GB1380140A true GB1380140A (en) 1975-01-08

Family

ID=22534041

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1272572A Expired GB1380140A (en) 1971-06-07 1972-03-17 Electronic measuring circuits

Country Status (5)

Country Link
JP (1) JPS52156572U (en)
CA (1) CA954189A (en)
DE (1) DE2227741A1 (en)
FR (1) FR2140397B1 (en)
GB (1) GB1380140A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3036955A1 (en) * 1979-10-10 1981-05-21 Elin-Union AG für elektrische Industrie, Wien ARRANGEMENT FOR DETERMINING THE RESONANCE FREQUENCY OF LOAD-DRIVEN INVERTERS WITH VIBRATING CIRCUIT

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3719505A1 (en) * 1987-06-11 1988-12-22 Telefunken Electronic Gmbh Frequency/voltage converter
CN104166045B (en) * 2013-05-15 2016-12-28 海洋王（东莞）照明科技有限公司 A kind of ac power supply frequency detecting device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535658A (en) * 1967-06-27 1970-10-20 Webb James E Frequency to analog converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3036955A1 (en) * 1979-10-10 1981-05-21 Elin-Union AG für elektrische Industrie, Wien ARRANGEMENT FOR DETERMINING THE RESONANCE FREQUENCY OF LOAD-DRIVEN INVERTERS WITH VIBRATING CIRCUIT

Also Published As

Publication number Publication date
CA954189A (en) 1974-09-03
JPS52156572U (en) 1977-11-28
DE2227741A1 (en) 1972-12-14
FR2140397B1 (en) 1976-01-16
FR2140397A1 (en) 1973-01-19

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees