GB1484253A - Electrical circuit means for detecting the frequency of input signals - Google Patents

Electrical circuit means for detecting the frequency of input signals

Info

Publication number
GB1484253A
GB1484253A GB5066673A GB5066673A GB1484253A GB 1484253 A GB1484253 A GB 1484253A GB 5066673 A GB5066673 A GB 5066673A GB 5066673 A GB5066673 A GB 5066673A GB 1484253 A GB1484253 A GB 1484253A
Authority
GB
United Kingdom
Prior art keywords
frequency
circuit
input signal
signal
oscillator
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
GB5066673A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB5066673A priority Critical patent/GB1484253A/en
Priority to IT5377874A priority patent/IT1021969B/en
Priority to CA212,673A priority patent/CA1008139A/en
Priority to DE19742451571 priority patent/DE2451571A1/en
Priority to SE7413681A priority patent/SE404088B/en
Priority to NL7414232A priority patent/NL7414232A/en
Priority to JP49124989A priority patent/JPS5836541B2/en
Priority to FR7436531A priority patent/FR2250228B1/fr
Priority to AT0880374A priority patent/AT363518B/en
Priority to US05/684,898 priority patent/US4024414A/en
Publication of GB1484253A publication Critical patent/GB1484253A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits
    • H03D1/2272—Homodyne or synchrodyne circuits using FET's

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

1484253 Frequency detectors G W GURRY and B F MCCARTHY 30 Oct 1974 [31 Oct 1973] 50666/73 Heading H3A A circuit for detecting when an input signal lies within a predetermined frequency range and has an amplitude exceeding a predetermined value comprises sampling circuits 3, 5 to which the input signal is supplied and which are also fed with sampling signals #2A, #2B, #3A, #3B, from a voltage controlled oscillator circuit 1, the control signal for the oscillator being derived from the sampling circuit 3. This circuit samples the input signal about its zero crossings to provide an output proportional to frequency. As long as the frequency of the input signal lies within the range determined by high and low limit signals fed to oscillator VCO the signal derived from sampler 3 will lock the oscillator circuit to the frequency of the incoming signal. Sampling signals #3A, #3B are phase displaced from #2A, #2B and sampler 5 produces an output dependent on amplitude. When this amplitude exceeds a predetermined value, a signal is produced at the OUTPUT terminal of the circuit.
GB5066673A 1973-10-31 1973-10-31 Electrical circuit means for detecting the frequency of input signals Expired GB1484253A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
GB5066673A GB1484253A (en) 1973-10-31 1973-10-31 Electrical circuit means for detecting the frequency of input signals
IT5377874A IT1021969B (en) 1973-10-31 1974-10-28 DEVICE FOR DETECTION OF SIGNALS HAVING A FREQUENCY WITHIN A PREFIXED FREQUENCY INTERVAL
CA212,673A CA1008139A (en) 1973-10-31 1974-10-30 Electrical circuit means for detecting the frequency of input signals
DE19742451571 DE2451571A1 (en) 1973-10-31 1974-10-30 ELECTRICAL CIRCUIT FOR FEELING THE FREQUENCY OF INPUT SIGNALS
SE7413681A SE404088B (en) 1973-10-31 1974-10-30 ELECTRICAL CIRCUIT DEVICE FOR DETECTING AN INSIGNAL OF A FREQUENCY WITHIN A PRESED SPECIFIED RATE
NL7414232A NL7414232A (en) 1973-10-31 1974-10-31 DEVICE FOR DETECTING INPUT SIGNALS WITH A FREQUENCY WITHIN A PRE-DETERMINED FREQUENCY RANGE.
JP49124989A JPS5836541B2 (en) 1973-10-31 1974-10-31 Denki Kairosouchi
FR7436531A FR2250228B1 (en) 1973-10-31 1974-10-31
AT0880374A AT363518B (en) 1973-10-31 1974-10-31 CIRCUIT FOR DETECTING INPUT SIGNALS WITH A FREQUENCY LOCATED WITHIN A PRESETED FREQUENCY RANGE
US05/684,898 US4024414A (en) 1973-10-31 1976-05-10 Electrical circuit means for detecting the frequency of input signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5066673A GB1484253A (en) 1973-10-31 1973-10-31 Electrical circuit means for detecting the frequency of input signals

Publications (1)

Publication Number Publication Date
GB1484253A true GB1484253A (en) 1977-09-01

Family

ID=10456865

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5066673A Expired GB1484253A (en) 1973-10-31 1973-10-31 Electrical circuit means for detecting the frequency of input signals

Country Status (9)

Country Link
JP (1) JPS5836541B2 (en)
AT (1) AT363518B (en)
CA (1) CA1008139A (en)
DE (1) DE2451571A1 (en)
FR (1) FR2250228B1 (en)
GB (1) GB1484253A (en)
IT (1) IT1021969B (en)
NL (1) NL7414232A (en)
SE (1) SE404088B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113608021A (en) * 2021-07-23 2021-11-05 华中科技大学 Chaotic oscillator circuit and weak signal detection system based on chaos theory

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1044144B (en) * 1975-07-30 1980-03-20 Selenia Ind Elettroniche IMPROVEMENT IN DEVICES FOR DETERMINING POINT ERRORS, PARTICULARLY IN RADAR SYSTEMS
US4127824A (en) * 1977-04-04 1978-11-28 Motorola, Inc. Sampling filter-detector
DE3040380C2 (en) * 1980-10-25 1983-11-17 Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Arrangement for frequency detection
JPH0246346U (en) * 1988-09-22 1990-03-29

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1094302A (en) * 1964-03-12 1967-12-06 Plessey Uk Ltd Improvements in or relating to frequency sensing systems
CA946922A (en) * 1971-04-19 1974-05-07 Wavetek Frequency detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113608021A (en) * 2021-07-23 2021-11-05 华中科技大学 Chaotic oscillator circuit and weak signal detection system based on chaos theory
CN113608021B (en) * 2021-07-23 2022-05-20 华中科技大学 Chaotic oscillator circuit and weak signal detection system based on chaos theory

Also Published As

Publication number Publication date
JPS5080707A (en) 1975-07-01
SE404088B (en) 1978-09-18
IT1021969B (en) 1978-02-20
CA1008139A (en) 1977-04-05
AT363518B (en) 1981-08-10
DE2451571A1 (en) 1975-06-05
NL7414232A (en) 1975-05-02
ATA880374A (en) 1981-01-15
FR2250228A1 (en) 1975-05-30
JPS5836541B2 (en) 1983-08-10
FR2250228B1 (en) 1978-06-16
SE7413681L (en) 1975-05-02

Similar Documents

Publication Publication Date Title
GB959387A (en) Frequency stabilised signal generating circuits
GB1236198A (en) A phase synchronising circuit
GB1383873A (en) Square to sine converter
GB1484253A (en) Electrical circuit means for detecting the frequency of input signals
GB1141350A (en) Phase lock circuit
GB1507734A (en) Phase locked loop circuits
GB1455621A (en) Frequency and phase control apparatus
JPS5676636A (en) Variable oscillation circuit
GB1020649A (en) Telemetering of analog and digital information
ES459130A1 (en) Receiver for a HF-intrusion detection system
GB1427604A (en) Phasemeter
GB1046700A (en) Improvements in or relating to automatic phase control circuits
JPS55149539A (en) Pll circuit
GB1209985A (en) Improvements in or relating to vehicle detector circuit arrangements
JPS56111342A (en) Detector for subsignal of am stereophinic modulated signal
GB1184211A (en) Alternating Voltage Generator
GB1262878A (en) Improvements in or relating to phase discriminating circuits
JPS55633A (en) Receiving unit
GB1129232A (en) Linearly swept frequency generator
SU475570A1 (en) Automatic antenna impedance matching device
JPS5750001A (en) Phase adjustment system
JPS54150564A (en) Alarm circuit for pll circuit
JPS5666952A (en) Carrier detection circuit
JPS56158545A (en) Pilot phase and frequency controlling circuit in digital processing type receiver for orthogonal multiplex signal
GB1184465A (en) Improvements in or relating to Electric Signal Sampling Arrangements

Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee