ZA764974B - Mixer bias circuit for varactor television tuners - Google Patents

Mixer bias circuit for varactor television tuners

Info

Publication number
ZA764974B
ZA764974B ZA764974A ZA764974A ZA764974B ZA 764974 B ZA764974 B ZA 764974B ZA 764974 A ZA764974 A ZA 764974A ZA 764974 A ZA764974 A ZA 764974A ZA 764974 B ZA764974 B ZA 764974B
Authority
ZA
South Africa
Prior art keywords
varactor
bias circuit
television tuners
mixer bias
mixer
Prior art date
Application number
ZA764974A
Other languages
English (en)
Inventor
G Carter
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 ZA764974B publication Critical patent/ZA764974B/xx

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)
ZA764974A 1975-08-25 1976-08-18 Mixer bias circuit for varactor television tuners ZA764974B (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
ZA764974B true ZA764974B (en) 1977-07-27

Family

ID=24433332

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA764974A ZA764974B (en) 1975-08-25 1976-08-18 Mixer bias circuit for varactor television tuners

Country Status (15)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3401863C2 (de) * 1984-01-20 1986-01-30 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Bandabhängig schaltbare VHF-Mischerschaltungsanordnung
JPH0630401Y2 (ja) * 1990-06-01 1994-08-17 橋本電機工業株式会社 ベニヤテンダーライザー

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
DE2638310B2 (de) 1978-01-05
FI63645C (fi) 1983-07-11
SE405667B (sv) 1978-12-18
AU1695976A (en) 1978-02-23
AU507375B2 (en) 1980-02-14
NL7609401A (nl) 1977-03-01
FI762357A (xx) 1977-02-26
JPS591011B2 (ja) 1984-01-10
FR2322481A1 (fr) 1977-03-25
ATA630276A (de) 1982-11-15
FI63645B (fi) 1983-03-31
SE7609198L (sv) 1977-02-26
BE845467A (fr) 1976-12-16
ES450963A1 (es) 1977-08-16
AT371651B (de) 1983-07-25
DE2638310C3 (de) 1981-11-05
JPS5227206A (en) 1977-03-01
DE2638310A1 (de) 1977-03-03
PL108050B1 (pl) 1980-03-31
FR2322481B1 (xx) 1980-05-30
GB1553869A (en) 1979-10-10
IT1067991B (it) 1985-03-21
DK380976A (da) 1977-02-26

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