JPS5811352U

JPS5811352U - Wireless communication device receiving circuit

Info

Publication number: JPS5811352U
Application number: JP1981105912U
Authority: JP
Inventors: 昌行松尾; 安彦　利夫; 邦治竪月
Original assignee: 松下電工株式会社
Priority date: 1981-07-15
Filing date: 1981-07-15
Publication date: 1983-01-25

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 drawings]

第１図はＰＬＬシンセサイザ回路の基本例の回路ブロッ
ク図、第２図、第３図ａ、　　ｂは同上の回路動作特性
図、第４図は本考案の一実施例の回路ブロック図、第５
図は同上のＰＬＬシンセサイザ回路のブロック図、第６
図は同上の要部の回路図であり、４は電圧制御発振器、
５ａ、５ｂは可変容量ダイオード、１５はＰＬＬシンセ
サイザ回路、１Ｂは受信検出回路、１９はプルインレン
ジ切換回路である。第５図　　　　　　、６〉し′／２Ｎ＠刺１ −−　第６図１　　　　１８−FIG. 1 is a circuit block diagram of a basic example of a PLL synthesizer circuit, FIGS. 2 and 3 a and b are circuit operation characteristic diagrams of the same as above, FIG.
The figure is a block diagram of the same PLL synthesizer circuit, No. 6.
The figure is a circuit diagram of the main parts of the same as above, 4 is a voltage controlled oscillator,
5a and 5b are variable capacitance diodes, 15 is a PLL synthesizer circuit, 1B is a reception detection circuit, and 19 is a pull-in range switching circuit. Figure 5, 6 〉shi'/2 N@Sashi 1 -- Figure 6 1 18-

Claims

[Scope of utility model registration request]

In a super-hetero gain receiving circuit of a wireless communication device that uses a PLL synthesizer circuit as a local oscillation circuit, operates the PLL synthesizer circuit intermittently during reception standby, and continuously uses it during a call, PLL
a first variable capacitance diode having voltage characteristics that widens the pull-in range as a variable capacitance diode for setting an oscillation possible region provided in a voltage controlled oscillator of a synthesizer circuit;
A voltage controlled oscillator is constructed by using two types of variable capacitance diodes, a second variable capacitance diode having voltage characteristics that narrow the pull-in range, and switching the first variable capacitance diode during reception standby and the second variable capacitance diode during a call. A receiving circuit for a wireless communication device comprising a receiving detection switching means connected to a receiving circuit.