GB1137707A - Frequency discriminator and detector unit - Google Patents

Frequency discriminator and detector unit

Info

Publication number
GB1137707A
GB1137707A GB15817/66A GB1581766A GB1137707A GB 1137707 A GB1137707 A GB 1137707A GB 15817/66 A GB15817/66 A GB 15817/66A GB 1581766 A GB1581766 A GB 1581766A GB 1137707 A GB1137707 A GB 1137707A
Authority
GB
United Kingdom
Prior art keywords
transistors
output
discriminator
frequency
filter
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
GB15817/66A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1137707A publication Critical patent/GB1137707A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/14—Demodulator circuits; Receiver circuits
    • H04L27/144—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements
    • H04L27/148—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements using filters, including PLL-type filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B28/00—Generation of oscillations by methods not covered by groups H03B5/00 - H03B27/00, including modification of the waveform to produce sinusoidal oscillations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3069—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output
    • H03F3/3076—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output with symmetrical driving of the end stage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/02—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general by means of diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/341—Muting when no signals or only weak signals are present
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/001—Volume compression or expansion in amplifiers without controlling loop
    • 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
    • H03K5/13—Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/14—Demodulator circuits; Receiver circuits
    • H04L27/144—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/72—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
    • H03F2203/7239—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal the gated amplifier being switched on or off by putting into parallel or not, by choosing between amplifiers and shunting lines by one or more switch(es)

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Nonlinear Science (AREA)
  • Theoretical Computer Science (AREA)
  • Amplifiers (AREA)
  • Manipulation Of Pulses (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Logic Circuits (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Transceivers (AREA)
  • Dc Digital Transmission (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Electronic Switches (AREA)
  • Small-Scale Networks (AREA)
GB15817/66A 1965-04-15 1966-04-12 Frequency discriminator and detector unit Expired GB1137707A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US44852165A 1965-04-15 1965-04-15

Publications (1)

Publication Number Publication Date
GB1137707A true GB1137707A (en) 1968-12-27

Family

ID=23780623

Family Applications (6)

Application Number Title Priority Date Filing Date
GB15817/66A Expired GB1137707A (en) 1965-04-15 1966-04-12 Frequency discriminator and detector unit
GB15818/66A Expired GB1137708A (en) 1965-04-15 1966-04-12 Signal delay circuit
GB15820/66A Expired GB1137710A (en) 1965-04-15 1966-04-12 Signal limiter
GB15819/66A Expired GB1137709A (en) 1965-04-15 1966-04-12 Variable gain circuit
GB15815/66A Expired GB1137705A (en) 1965-04-15 1966-04-12 Oscillator
GB15816/66A Expired GB1137706A (en) 1965-04-15 1966-04-12 Transmission line driver-terminator

Family Applications After (5)

Application Number Title Priority Date Filing Date
GB15818/66A Expired GB1137708A (en) 1965-04-15 1966-04-12 Signal delay circuit
GB15820/66A Expired GB1137710A (en) 1965-04-15 1966-04-12 Signal limiter
GB15819/66A Expired GB1137709A (en) 1965-04-15 1966-04-12 Variable gain circuit
GB15815/66A Expired GB1137705A (en) 1965-04-15 1966-04-12 Oscillator
GB15816/66A Expired GB1137706A (en) 1965-04-15 1966-04-12 Transmission line driver-terminator

Country Status (6)

Country Link
US (1) US3432616A (US06544258-20030408-M00015.png)
JP (1) JPS5317841B1 (US06544258-20030408-M00015.png)
CH (5) CH434353A (US06544258-20030408-M00015.png)
DE (4) DE1274638B (US06544258-20030408-M00015.png)
GB (6) GB1137707A (US06544258-20030408-M00015.png)
NL (1) NL6604814A (US06544258-20030408-M00015.png)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577234A (en) * 1983-10-31 1986-03-18 Rca Corporation Driver amplifier for an image display device
GB2227385A (en) * 1988-11-24 1990-07-25 Motorola Inc Soft limiting microphone amplifier circuit
GB2295289B (en) * 1992-10-28 1996-07-17 Plessey Semiconductors Ltd Wideband constant impedance amplifiers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1171010B (de) * 1962-08-03 1964-05-27 Telefunken Patent Transistorisierter und temperatur-kompensierter Schmitt-Trigger zur Verwendung als Spannungsdiskriminator, insbesondere fuer Regeleinrichtungen der Nachrichtentechnik
DE1172305B (de) * 1962-09-01 1964-06-18 Pollux G M B H Elektronischer Schalter
CH411034A (de) * 1963-11-29 1966-04-15 Landis & Gyr Ag Kippschaltung
US3371291A (en) * 1965-01-11 1968-02-27 Astrodata Inc Current control of oscillator frequency

Also Published As

Publication number Publication date
CH431628A (de) 1967-03-15
GB1137710A (en) 1968-12-27
DE1274638B (de) 1968-08-08
JPS5317841B1 (US06544258-20030408-M00015.png) 1978-06-12
GB1137708A (en) 1968-12-27
CH434353A (de) 1967-04-30
CH445557A (de) 1967-10-31
US3432616A (en) 1969-03-11
GB1137705A (en) 1968-12-27
DE1462672B2 (de) 1971-06-24
DE1462671A1 (de) 1969-02-27
DE1462671B2 (de) 1971-11-18
GB1137709A (en) 1968-12-27
DE1462672A1 (de) 1968-12-05
CH445563A (de) 1967-10-31
DE1462670A1 (de) 1968-12-19
NL6604814A (US06544258-20030408-M00015.png) 1966-10-17
GB1137706A (en) 1968-12-27
CH450500A (de) 1968-01-31
DE1462670B2 (de) 1971-09-16

Similar Documents

Publication Publication Date Title
US2413023A (en) Demodulator
SE320999B (US06544258-20030408-M00015.png)
US3461390A (en) Dicode decoder translating dicode or three-level digital data signal into two level form
GB959387A (en) Frequency stabilised signal generating circuits
US4634987A (en) Frequency multiplier
GB1137707A (en) Frequency discriminator and detector unit
US3832637A (en) Fsk modem
US2583484A (en) Combined angular velocity and pulse modulation system
GB1121865A (en) Magnetic recording and reproducing system
US3746993A (en) Carrier detection circuit
US2784311A (en) Suppressed-carrier reception
GB1220878A (en) Improvements in and relating to communication systems
GB1160603A (en) Improvements in or relating to Transistorised Modulatable Oscillation Generators, Demodulators, Phase Detectors and Frequency Shifters
US3573650A (en) Automatic frequency controlled oscillators
US3559083A (en) Digital demodulator for frequency shift keying systems
GB964176A (en) A data transmission arrangement utilising phase shift carrier signalling
US3652876A (en) Data transmission system, utilizing ac line frequency as clock
GB1270456A (en) Radio receiving apparatus
US2517618A (en) Detector for time modulated pulses
US3546607A (en) Noise immune muting circuit for pulse counting detectors
US2999155A (en) Signal receiving system
US3371225A (en) Clocking pulse rate detection circuitry
GB1117475A (en) Method of measuring frequency dependent group delay distortion
GB1031596A (en) Improvements in or relating to suppressed carrier transmission systems
GB1047531A (en) Receiver and communication system including such a receiver