GB1160929A - Remote Tuning Control - Google Patents

Remote Tuning Control

Info

Publication number
GB1160929A
GB1160929A GB1346167A GB1346167A GB1160929A GB 1160929 A GB1160929 A GB 1160929A GB 1346167 A GB1346167 A GB 1346167A GB 1346167 A GB1346167 A GB 1346167A GB 1160929 A GB1160929 A GB 1160929A
Authority
GB
United Kingdom
Prior art keywords
diodes
transistor
tuning
circuits
march
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
GB1346167A
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.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
ITT Industries Inc
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 Deutsche ITT Industries GmbH, ITT Industries Inc filed Critical Deutsche ITT Industries GmbH
Publication of GB1160929A publication Critical patent/GB1160929A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/29—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator multistable
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/12—Electric signal transmission systems in which the signal transmitted is frequency or phase of ac
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Selective Calling Equipment (AREA)
  • Details Of Television Systems (AREA)
  • Electronic Switches (AREA)

Abstract

1,160,929. Selective signalling. ITT INDUSTRIES Inc. 22 March, 1967 [25 March, 1966], No. 13461/67. Heading G4H. [Also in Division H3] A frequency-selective switching circuit has one transistor for each frequency to be received and diodes connecting the output of each transistor to the inputs of the others so that only one of the latter can conduct at a time. As applied to the remote tuning of a television receiver (Fig. 2) control signals are applied at B1 to tuned circuits # 1 , # 2 , # 3 , one of which will respond and allow conduction of the corresponding transistor which rectifies the signal. If T 1 conducts, diodes D 12 and D 13 will bias off the other transistors through D 2 and D 3 . Current flowing through collector load potentiometer P 1 , P 2 or P 3 causes a predetermined voltage to be applied to capacitance diodes (not shown) which form the tuning elements. At the same time another predetermined voltage is taken off from P<SP>1</SP> 1 , P<SP>1</SP> 2 or P<SP>1</SP> 3 to set other parameters to the optimum for the channel being received, e.g. brightness, contrast or sound volume. Glow tubes G 1 , G 2 , G 3 indicate which channel is in operation and local control can be effected by manual or electronic switches S 1 , S 2 , S 3 . The signals at B 1 may be derived from acoustic, optical or electromagnetic control signals. Series-resonant or other filter circuits may be used instead of parallel resonant circuits. Diodes D 1 -D 3 may be omitted if the baseemitter threshold of the transistors is greater than the sum of the collector-emitter saturation voltage and the forward drop across diodes D 12 &c. The potentiometers P 1 -P 3 may be replaced by relays which control a tuning motor.
GB1346167A 1966-03-25 1967-03-22 Remote Tuning Control Expired GB1160929A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0049702 1966-03-25

Publications (1)

Publication Number Publication Date
GB1160929A true GB1160929A (en) 1969-08-06

Family

ID=7052085

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1346167A Expired GB1160929A (en) 1966-03-25 1967-03-22 Remote Tuning Control

Country Status (3)

Country Link
AT (1) AT277337B (en)
DE (1) DE1538422B2 (en)
GB (1) GB1160929A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2019375A1 (en) * 1970-04-22 1971-11-11 Standard Elek K Lorenz Ag Circuit for correcting the temperature response of capacitance diodes, especially in key circuits for programmed frequency selection in radio and television equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2019375A1 (en) * 1970-04-22 1971-11-11 Standard Elek K Lorenz Ag Circuit for correcting the temperature response of capacitance diodes, especially in key circuits for programmed frequency selection in radio and television equipment

Also Published As

Publication number Publication date
DE1538422B2 (en) 1975-03-27
AT277337B (en) 1969-12-29
DE1538422A1 (en) 1969-05-14

Similar Documents

Publication Publication Date Title
US2912574A (en) Power saving and decoding circuit for radio receiver
US3919482A (en) FM receiver noise suppression circuit
GB1039045A (en) Voltage frequency converter
US3144598A (en) Bidirectional motor control circuit
US2999170A (en) Receivers for use in electric signalling systems
GB1160929A (en) Remote Tuning Control
US3307112A (en) Demodulator circuits for frequency modulated electrical signals
US2736769A (en) Noise cut-off synchronizing signal separator
US3122608A (en) Circuit for discriminating between signal components
US3336533A (en) Electronic circuit
US3193732A (en) Tone controlled relay circuit
US4575859A (en) Receiver for digital signals
US3402303A (en) Level sensitive switching circuit utilizing a zener diode for determining switching points and switching sensitivity
US2979563A (en) Transistor-sync separator and automatic gain control circuit
US3467868A (en) Automatic muting networks for signal seeking receivers
GB1357379A (en) Television receiver tuning system
US3377426A (en) Amplitude limiting signal translating circuit utilizing a voltage dependent resistor in the output circuit
ATE4T1 (en) CIRCUIT ARRANGEMENT FOR EARTH-FREE TRANSMISSION OF SIGNALS VIA SEPARATION POINTS IN TELECOMMUNICATION SYSTEMS
US3040256A (en) Selective signaling system with narrow band feedback
US3688198A (en) Vhf and uhf automatic gain control circuitry derived from a single control voltage
GB1191423A (en) Signal Translating Arrangement.
US4211938A (en) Tone detector
JPS6310628B2 (en)
JPS631477Y2 (en)
KR840002600A (en) Synchronization device

Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PLNP Patent lapsed through nonpayment of renewal fees