JPS5642439A - Broad band tuner - Google Patents

Broad band tuner

Info

Publication number
JPS5642439A
JPS5642439A JP11861879A JP11861879A JPS5642439A JP S5642439 A JPS5642439 A JP S5642439A JP 11861879 A JP11861879 A JP 11861879A JP 11861879 A JP11861879 A JP 11861879A JP S5642439 A JPS5642439 A JP S5642439A
Authority
JP
Japan
Prior art keywords
oscillator
frequency
variable
oscillation frequency
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
JP11861879A
Other languages
Japanese (ja)
Inventor
Shigeo Fujimori
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 JP11861879A priority Critical patent/JPS5642439A/en
Publication of JPS5642439A publication Critical patent/JPS5642439A/en
Pending 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
    • H03J5/02—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

Landscapes

  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To stabilize broad band tuning byf making it possible to select the oscillation frequency band of a variable oscillator independently of an intermediate frequency by obtaining a local oscillation frequency signal from the difference in frequency between the variable oscillator and a fixed oscillator. CONSTITUTION:Of the television tuner, local oscillating circuit 6 consists of variable oscillator 61, fixed oscillator 62 and mixer 63 and the frequency difference between oscillators 61 and 62 is generated as a local oscillation frequency signal. For this purpose, a relatively high frequency band of 3,150-3,824MHz, etc., is used for oscillator 61 and the local oscillation frequency of oscillator 62 is only set to 3,000MHz so as to set the local oscillation frequency in the normally used range of 150-824MHz for the single conversion system. Consequently, an input signal to mixer 5 is converted into a signal of the current intermediate frequency, which is outputted to tuner output 7. Thus, the oscillation frequency of variable oscillator 61 can be selected in the variable range of the variable tuning element independently of the intermediate frequency.
JP11861879A 1979-09-14 1979-09-14 Broad band tuner Pending JPS5642439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11861879A JPS5642439A (en) 1979-09-14 1979-09-14 Broad band tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11861879A JPS5642439A (en) 1979-09-14 1979-09-14 Broad band tuner

Publications (1)

Publication Number Publication Date
JPS5642439A true JPS5642439A (en) 1981-04-20

Family

ID=14740995

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11861879A Pending JPS5642439A (en) 1979-09-14 1979-09-14 Broad band tuner

Country Status (1)

Country Link
JP (1) JPS5642439A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56117436A (en) * 1980-02-21 1981-09-14 Matsushita Electric Ind Co Ltd Television tuner
JPS59217560A (en) * 1983-05-25 1984-12-07 M Ii D Kk Material feed controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56117436A (en) * 1980-02-21 1981-09-14 Matsushita Electric Ind Co Ltd Television tuner
JPS59217560A (en) * 1983-05-25 1984-12-07 M Ii D Kk Material feed controller

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