JPS5588433A - Afc device - Google Patents

Afc device

Info

Publication number
JPS5588433A
JPS5588433A JP16573378A JP16573378A JPS5588433A JP S5588433 A JPS5588433 A JP S5588433A JP 16573378 A JP16573378 A JP 16573378A JP 16573378 A JP16573378 A JP 16573378A JP S5588433 A JPS5588433 A JP S5588433A
Authority
JP
Japan
Prior art keywords
discrimination output
frequency shift
diodes
parallel
local oscillation
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.)
Pending
Application number
JP16573378A
Other languages
Japanese (ja)
Inventor
Tomio Matsushita
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP16573378A priority Critical patent/JPS5588433A/en
Publication of JPS5588433A publication Critical patent/JPS5588433A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/02—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Television Receiver Circuits (AREA)

Abstract

PURPOSE:To avoid the interference due to the undesired signal contained in the discrimination output by detecting the frequency shift of the VIF signals through the frequency discriminator and then applying the frequency shift to the variable capacity diode of the local oscillation circuit via the diodes which are connected in parallel and with the opposite polarities to each other. CONSTITUTION:The frequency shift is detected for the VIF signals through frequency discriminator 14 of the Foster-Seeley circuit or the like and then converted into the low impedance through transistor Tr15 to generate the discrimination output. This discrimination output is applied to one end of diodes 12a and 12b each which are connected in parallel and with the opposite polarities to each other and then extracted through the other end to be applied to AFC variable capacity diode 16 of local oscillation circuit 3. As a result, the interference caused by the undesired signal of the component or the like of the video signal contained in the discrimination output can be avoided.
JP16573378A 1978-12-26 1978-12-26 Afc device Pending JPS5588433A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16573378A JPS5588433A (en) 1978-12-26 1978-12-26 Afc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16573378A JPS5588433A (en) 1978-12-26 1978-12-26 Afc device

Publications (1)

Publication Number Publication Date
JPS5588433A true JPS5588433A (en) 1980-07-04

Family

ID=15818034

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16573378A Pending JPS5588433A (en) 1978-12-26 1978-12-26 Afc device

Country Status (1)

Country Link
JP (1) JPS5588433A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5126452A (en) * 1974-08-29 1976-03-04 Fujitsu Ltd

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5126452A (en) * 1974-08-29 1976-03-04 Fujitsu Ltd

Similar Documents

Publication Publication Date Title
DE2961024D1 (en) Microwave moisture measurement device with commutable measuring range
KR900001125A (en) FM receiver automatic frequency control
JPS5588433A (en) Afc device
KR840002602A (en) Method and apparatus for applying the phase according to the incoming signal to the oscillator
KR870010702A (en) AM stereo receiver
KR830009846A (en) Receiver of television voice signal
JPS56782A (en) Automatic tuning unit
JPS5353949A (en) Frequency discriminator
EP0245886A3 (en) Circuit arrangement for a picture-reproducing device
SU468386A1 (en) Device for receiving signals with phase shift keying
JPS5534382A (en) Separator circuit for synchronizing signal
JPS56119506A (en) Noise eliminating circuit
SOKOLOVSKII et al. Gunn diode oscillator with smooth tuning
JPS5781721A (en) Pulse input detector
JPS5568729A (en) Input circuit with input level decision
KR890009104A (en) Multiplexing FM Detection Using Injection Luck Oscillator
JPS5394167A (en) Digital phase synchronous loop
JPS57135519A (en) Tuning circuit
JPS53118928A (en) Video detecting unit
JPS52124849A (en) Timing signal detection circuit
JPS5533376A (en) Frequency discriminator circuit
JPS5466063A (en) Fm discriminator
JPS57186808A (en) Phase detecting circuit
JPS5686560A (en) Carrier reproduction device
JPS5735429A (en) Single side-band receiver