JPS6326125U

JPS6326125U -

Info

Publication number: JPS6326125U
Application number: JP11765986U
Authority: JP
Priority date: 1986-07-31
Filing date: 1986-07-31
Publication date: 1988-02-20

Description

[Brief explanation of the drawing]

第１図は本考案による同調回路の一実施例の構
成を示す結線図、第２図は第１図の実施例の等価
回路を示す結線図、第３図は本考案の他の実施例
の構成を示す結線図、第４図は第３図の実施例の
等価回路を示す結線図、第５図は従来の同調回路
の構成例を示す結線図、第６図は従来の同調回路
の他の構成例を示す結線図、第７図は第５図の従
来例の等価回路を示す結線図、第８図は第６図の
従来例の等価回路を示す結線図である。３０，４０は同調回路、１１はコイル、１２は
固定コンデンサ、１３，２３は可変容量ダイオー
ドである。 Fig. 1 is a wiring diagram showing the configuration of one embodiment of a tuning circuit according to the present invention, Fig. 2 is a wiring diagram showing an equivalent circuit of the embodiment of Fig. 1, and Fig. 3 is a wiring diagram of another embodiment of the invention. 4 is a wiring diagram showing an equivalent circuit of the embodiment shown in FIG. 3, FIG. 5 is a wiring diagram showing an example of the configuration of a conventional tuning circuit, and FIG. 6 is a wiring diagram showing an example of the configuration of a conventional tuning circuit. 7 is a wiring diagram showing an equivalent circuit of the conventional example shown in FIG. 5, and FIG. 8 is a wiring diagram showing an equivalent circuit of the conventional example shown in FIG. 6. 30 and 40 are tuning circuits, 11 is a coil, 12 is a fixed capacitor, and 13 and 23 are variable capacitance diodes.

Claims

[Claims for Utility Model Registration] A fixed capacitor, a variable capacitance diode, and a coil connected in series are connected in parallel, and
A tuning circuit in which a tuning voltage is supplied to the variable capacitance diode via a resistor, wherein a midpoint of connection between the fixed capacitor and the coil is connected to a reference potential.