FR1502173A - Electronic frequency determination method and device - Google Patents

Electronic frequency determination method and device

Info

Publication number
FR1502173A
FR1502173A FR82848A FR82848A FR1502173A FR 1502173 A FR1502173 A FR 1502173A FR 82848 A FR82848 A FR 82848A FR 82848 A FR82848 A FR 82848A FR 1502173 A FR1502173 A FR 1502173A
Authority
FR
France
Prior art keywords
determination method
frequency determination
electronic frequency
electronic
frequency
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
FR82848A
Other languages
French (fr)
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.)
Westland Group PLC
Original Assignee
Westland Aircraft 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 Westland Aircraft Ltd filed Critical Westland Aircraft Ltd
Application granted granted Critical
Publication of FR1502173A publication Critical patent/FR1502173A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/46—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to frequency deviations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/006—Details of instruments used for thermal compensation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • G01P1/106—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the time duration between two impulses with a reference time
    • 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
FR82848A 1965-11-15 1966-11-08 Electronic frequency determination method and device Expired FR1502173A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4846765 1965-11-15

Publications (1)

Publication Number Publication Date
FR1502173A true FR1502173A (en) 1967-11-18

Family

ID=10448710

Family Applications (1)

Application Number Title Priority Date Filing Date
FR82848A Expired FR1502173A (en) 1965-11-15 1966-11-08 Electronic frequency determination method and device

Country Status (2)

Country Link
DE (1) DE1541895A1 (en)
FR (1) FR1502173A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396978A1 (en) * 1978-07-07 1979-02-02 Cgs Apparecch Frequency to current conversion circuit - provides current amplitude indication as function of pulse repetition frequency for tachometer
JPS55109968A (en) * 1979-02-16 1980-08-23 Nissan Motor Co Ltd Frequency decision circuit

Also Published As

Publication number Publication date
DE1541895A1 (en) 1969-11-06

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