GB844561A - Improvements in or relating to frequency detectors - Google Patents

Improvements in or relating to frequency detectors

Info

Publication number
GB844561A
GB844561A GB32423/58A GB3242358A GB844561A GB 844561 A GB844561 A GB 844561A GB 32423/58 A GB32423/58 A GB 32423/58A GB 3242358 A GB3242358 A GB 3242358A GB 844561 A GB844561 A GB 844561A
Authority
GB
United Kingdom
Prior art keywords
frequency
amplitude
output
voltage
ratio
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
GB32423/58A
Other languages
English (en)
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB844561A publication Critical patent/GB844561A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/08—Measuring resistance by measuring both voltage and current
    • G01R27/10—Measuring resistance by measuring both voltage and current using two-coil or crossed-coil instruments forming quotient
    • G01R27/12—Measuring resistance by measuring both voltage and current using two-coil or crossed-coil instruments forming quotient using hand generators, e.g. meggers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computational Linguistics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
GB32423/58A 1957-10-14 1958-10-10 Improvements in or relating to frequency detectors Expired GB844561A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL221597A NL97484C (nl) 1957-10-14 1957-10-14 Frequentiedetector voor het bepalen van de karakteristieke frequentie van een binnen een een zekere gespreksband optredende trilling

Publications (1)

Publication Number Publication Date
GB844561A true GB844561A (en) 1960-08-17

Family

ID=1838804

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32423/58A Expired GB844561A (en) 1957-10-14 1958-10-10 Improvements in or relating to frequency detectors

Country Status (6)

Country Link
US (1) US2995707A (enExample)
JP (1) JPS368093B1 (enExample)
DE (1) DE1151284B (enExample)
FR (1) FR1212914A (enExample)
GB (1) GB844561A (enExample)
NL (1) NL97484C (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129860A (en) * 1974-09-06 1976-03-13 Matsushita Electric Industrial Co Ltd Fmmam henkanki
GB2187581B (en) * 1985-04-10 1989-06-21 Matsushita Electric Industrial Co Ltd Control circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2323108C2 (de) * 1970-12-18 1983-01-20 Siemens AG, 1000 Berlin und 8000 München Verfahren zur Ermittlung der Grundfrequenz eines wenigstens zeitweise periodischen Signals
TWI672004B (zh) * 2018-12-11 2019-09-11 Silicon Integrated Systems Corporation 頻率偵測器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896161A (en) * 1942-06-30 1959-07-21 Bessie E Fox Measuring system
US2418284A (en) * 1943-04-24 1947-04-01 Bendix Aviat Corp Differential voltage measuring circuit
US2541067A (en) * 1944-11-30 1951-02-13 Sperry Corp Frequency responsive device
US2576249A (en) * 1947-08-28 1951-11-27 Bell Telephone Labor Inc Level ratio measuring system
US2711516A (en) * 1949-10-29 1955-06-21 Rca Corp Frequency discriminatory systems
GB788565A (en) * 1954-08-11 1958-01-02 Gen Electric Improvements in and relating to frequency response determining apparatus
US2857465A (en) * 1955-11-21 1958-10-21 Bell Telephone Labor Inc Vocoder transmission system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129860A (en) * 1974-09-06 1976-03-13 Matsushita Electric Industrial Co Ltd Fmmam henkanki
GB2187581B (en) * 1985-04-10 1989-06-21 Matsushita Electric Industrial Co Ltd Control circuit
US4951273A (en) * 1985-04-10 1990-08-21 Matsushita Electric Industrial Co., Ltd. Optical recording and reproducing device with normalization of servo control signal using switchable automatic gain control circuitry

Also Published As

Publication number Publication date
FR1212914A (fr) 1960-03-28
JPS368093B1 (enExample) 1961-06-20
DE1151284B (de) 1963-07-11
US2995707A (en) 1961-08-08
NL97484C (nl) 1961-03-15

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