ES450963A1 - Tuner apparatus with mixer bias circuit - Google Patents

Tuner apparatus with mixer bias circuit

Info

Publication number
ES450963A1
ES450963A1 ES450963A ES450963A ES450963A1 ES 450963 A1 ES450963 A1 ES 450963A1 ES 450963 A ES450963 A ES 450963A ES 450963 A ES450963 A ES 450963A ES 450963 A1 ES450963 A1 ES 450963A1
Authority
ES
Spain
Prior art keywords
oscillator
mixer
signals
output signals
amplitude
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
ES450963A
Other languages
Spanish (es)
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Publication of ES450963A1 publication Critical patent/ES450963A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
    • H03J5/244—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/12—Transference of modulation from one carrier to another, e.g. frequency-changing by means of semiconductor devices having more than two electrodes
    • H03D7/125—Transference of modulation from one carrier to another, e.g. frequency-changing by means of semiconductor devices having more than two electrodes with field effect transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0218—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, by selecting the corresponding analogue value between a set of preset values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

Improvements in radiofrequency synthesizers that have a local oscillator controlled by veractor, whose oscillator provides output signals of different amplitude at different frequencies, in which means are combined to match the selected direct tuning voltages to said oscillator for each channel that has to be tune in; a mixer coupled to said oscillator and responsive to the output signals thereof and to the received radio frequency signals to provide intermediate frequency output signals; characterized in that the mixer is provided with means for coupling at least a portion of said selected direct tuning voltage to said mixer for biasing said mixer and providing a greater conversion gain for low amplitude oscillator signals than for high amplitude oscillator signals. . (Machine-translation by Google Translate, not legally binding)
ES450963A 1975-08-25 1976-08-25 Tuner apparatus with mixer bias circuit Expired ES450963A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60769875A 1975-08-25 1975-08-25

Publications (1)

Publication Number Publication Date
ES450963A1 true ES450963A1 (en) 1977-08-16

Family

ID=24433332

Family Applications (1)

Application Number Title Priority Date Filing Date
ES450963A Expired ES450963A1 (en) 1975-08-25 1976-08-25 Tuner apparatus with mixer bias circuit

Country Status (15)

Country Link
JP (1) JPS591011B2 (en)
AT (1) AT371651B (en)
AU (1) AU507375B2 (en)
BE (1) BE845467A (en)
DE (1) DE2638310C3 (en)
DK (1) DK380976A (en)
ES (1) ES450963A1 (en)
FI (1) FI63645C (en)
FR (1) FR2322481A1 (en)
GB (1) GB1553869A (en)
IT (1) IT1067991B (en)
NL (1) NL7609401A (en)
PL (1) PL108050B1 (en)
SE (1) SE405667B (en)
ZA (1) ZA764974B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3401863C2 (en) * 1984-01-20 1986-01-30 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Band-dependent switchable VHF mixer circuitry
JPH0630401Y2 (en) * 1990-06-01 1994-08-17 橋本電機工業株式会社 Veneer tenderizer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970254A (en) * 1974-08-19 1976-07-20 Black Clawson Fibreclaim, Inc. Method for separating glass from heat resistant materials
US3976944A (en) * 1975-02-13 1976-08-24 General Electric Company Bias optimized FET mixer for varactor tuner

Also Published As

Publication number Publication date
DE2638310A1 (en) 1977-03-03
GB1553869A (en) 1979-10-10
NL7609401A (en) 1977-03-01
AT371651B (en) 1983-07-25
BE845467A (en) 1976-12-16
ATA630276A (en) 1982-11-15
FI63645B (en) 1983-03-31
JPS591011B2 (en) 1984-01-10
DE2638310C3 (en) 1981-11-05
SE7609198L (en) 1977-02-26
DE2638310B2 (en) 1978-01-05
ZA764974B (en) 1977-07-27
PL108050B1 (en) 1980-03-31
FI762357A (en) 1977-02-26
SE405667B (en) 1978-12-18
DK380976A (en) 1977-02-26
FI63645C (en) 1983-07-11
AU507375B2 (en) 1980-02-14
IT1067991B (en) 1985-03-21
AU1695976A (en) 1978-02-23
JPS5227206A (en) 1977-03-01
FR2322481B1 (en) 1980-05-30
FR2322481A1 (en) 1977-03-25

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20100623