JPS599634U

JPS599634U - electronic tuning receiver

Info

Publication number: JPS599634U
Application number: JP10370382U
Authority: JP
Inventors: 服部　雄三
Original assignee: 三洋電機株式会社
Priority date: 1982-07-07
Filing date: 1982-07-07
Publication date: 1984-01-21
Also published as: JPH0215404Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の電子同調受信機を示す回路図、第２図は
本考案に係る電子同調受信機を示す回路図である。Ｓ′１．・Ｓ“１・・・マニュアル・フリセット切換ス
イッチの第１回路及び第２回路、ＶＲ１・・・マニュア
ル選局用可変抵抗器、ＶＲ２，ＶＲ３，ＶＲ，・・・プ
リセット調整用可変抵抗器、５ＶＲ２・・・最低電圧設
定用半固定抵抗器、Ｄ６．Ｄ７・・・第１第２のダイオ
ード、ｃ４．　ｃ、・・・第１第２のハムフィルタ、Ｖ
Ｃｌ、ＶＯ２・・・可変容量ダイオード、１・・・同調
回路。FIG. 1 is a circuit diagram showing a conventional electronic tuning receiver, and FIG. 2 is a circuit diagram showing an electronic tuning receiver according to the present invention. S'1.・S"1...First circuit and second circuit of manual/preset changeover switch, VR1...variable resistor for manual channel selection, VR2, VR3, VR,...variable resistor for preset adjustment, 5VR2...Semi-fixed resistor for minimum voltage setting, D6.D7...First and second diode, c4.c,...First and second hum filter, V
Cl, VO2...variable capacitance diode, 1...tuned circuit.

Claims

[Scope of utility model registration request]

(1) The first circuit in which the fixed contact on the manual side is connected to the variable resistor side for manual tuning, and the fixed contact on the preset side is connected to the variable resistor side for preset adjustment, and the common contact A manual preset changeover switch is provided, which is connected to a voltage setting resistor and is configured with a second switch that operates in conjunction with the first circuit, and connects the common contact of the first circuit with the voltage variable reactance element of the tuned circuit. A first diode is connected between the preset side fixed contact of the second circuit and the voltage variable reactance element, and a second diode is connected between the preset side fixed contact of the second circuit and the voltage variable reactance element. The voltage adjusted by the variable resistor for preset adjustment is applied to the voltage variable reactance element via the first diode, and the voltage adjusted by the variable resistor for preset adjustment or the minimum voltage setting resistor is applied at the time of preset tuning. The electronic tuning receiver is configured to selectively apply a voltage set by the first and second diodes to the voltage variable reactance element, the voltage being set by the first diode to be applied selectively to the voltage variable reactance element during manual channel selection. An electronically tuned receiver characterized in that the temperature compensation of the variable reactance element is performed, and the temperature compensation of the voltage variable reactance element is also performed by the first or second diode during preset channel selection. Machine.

(2) A first hum filter capacitor is connected to the common contact point of the first circuit of the manual/preset changeover switch and the preset side of the second circuit of the manual/preset changeover switch. 2. The electronic tuning receiver according to claim 1, wherein a second hum filter cozodenser is connected between the fixed contact and the ground.

(3) The electronic tuning receiver according to claim 1, wherein the voltage variable reactance element is a variable capacitance diode.