JPS56103543A - Tuner circuit of television picture receiver - Google Patents

Tuner circuit of television picture receiver

Info

Publication number
JPS56103543A
JPS56103543A JP543380A JP543380A JPS56103543A JP S56103543 A JPS56103543 A JP S56103543A JP 543380 A JP543380 A JP 543380A JP 543380 A JP543380 A JP 543380A JP S56103543 A JPS56103543 A JP S56103543A
Authority
JP
Japan
Prior art keywords
circuit
base
transistors
carrier signal
tuner
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.)
Granted
Application number
JP543380A
Other languages
Japanese (ja)
Other versions
JPS6221456B2 (en
Inventor
Joji Nagai
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP543380A priority Critical patent/JPS56103543A/en
Publication of JPS56103543A publication Critical patent/JPS56103543A/en
Publication of JPS6221456B2 publication Critical patent/JPS6221456B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H03D7/14—Balanced arrangements
    • H03D7/1425—Balanced arrangements with transistors
    • H03D7/1433—Balanced arrangements with transistors using bipolar transistors
    • 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
    • H03D7/14—Balanced arrangements
    • H03D7/1425—Balanced arrangements with transistors
    • 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
    • H03D7/14—Balanced arrangements
    • H03D7/1425—Balanced arrangements with transistors
    • H03D7/1458—Double balanced arrangements, i.e. where both input signals are differential
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0043—Bias and operating point

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To simplify the constitution of a tuner circuit, by connecting the carrier input of an unbalanced circuit to one of the base of two transistors that have a differential action with reception of the carrier signal and connecting the external impedance to the other base. CONSTITUTION:The mixing circuit 30 connects the differential amplifying transistors TR14 and 15 receiving the carrier signal in series to the transistors TR17-20 in the double-balanced differential amplifying circuit that receives the balanced local oscillation signal, and then transmits the intermediate frequency output obtained by mixing the local oscillation signal and the carrier signal from the collectors of TRs 17-20. The output of the unbalanced tuning circuit 1 is connected to the base of the TR14 via the capacitor 25, and the external impedance Z26 is connected between the base of TR15 and the earth. The gain of the circuit 30 is adversely proportional to the value of Z26. The Z26 functions as an equivalent bias power source to the TR15, and the value of the power source is selected to such a range in which the attenuation quantity of tuner gain can store the noise factor within a range of allowance.
JP543380A 1980-01-21 1980-01-21 Tuner circuit of television picture receiver Granted JPS56103543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP543380A JPS56103543A (en) 1980-01-21 1980-01-21 Tuner circuit of television picture receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP543380A JPS56103543A (en) 1980-01-21 1980-01-21 Tuner circuit of television picture receiver

Publications (2)

Publication Number Publication Date
JPS56103543A true JPS56103543A (en) 1981-08-18
JPS6221456B2 JPS6221456B2 (en) 1987-05-13

Family

ID=11611055

Family Applications (1)

Application Number Title Priority Date Filing Date
JP543380A Granted JPS56103543A (en) 1980-01-21 1980-01-21 Tuner circuit of television picture receiver

Country Status (1)

Country Link
JP (1) JPS56103543A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001060839A (en) * 1999-08-19 2001-03-06 Murata Mfg Co Ltd Three-terminal filter, receiving module and portable radio device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54100617A (en) * 1978-01-26 1979-08-08 Sony Corp Mixer circuit
JPS54138328A (en) * 1978-04-20 1979-10-26 Toshiba Corp Television tuner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54100617A (en) * 1978-01-26 1979-08-08 Sony Corp Mixer circuit
JPS54138328A (en) * 1978-04-20 1979-10-26 Toshiba Corp Television tuner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001060839A (en) * 1999-08-19 2001-03-06 Murata Mfg Co Ltd Three-terminal filter, receiving module and portable radio device

Also Published As

Publication number Publication date
JPS6221456B2 (en) 1987-05-13

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