JPS63200937U

JPS63200937U -

Info

Publication number: JPS63200937U
Application number: JP1987093161U
Authority: JP
Priority date: 1987-06-16
Filing date: 1987-06-16
Publication date: 1988-12-23

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の同期検出回路のブ
ロツク図、第２図は一実施例の比較回路の動作を
説明するための図、第３図は従来のホツピング無
線機のブロツク図、第４図はホツピング無線機の
動作を説明するためのタイミング図である。図において、１は高周波増幅器、２は主ＭＩＸ
回路、３は可変局部発振器、４は中間周波増幅部
、５は検波回路、６はスピーカ、７は同期検出回
路、８―１〜８―４は第１〜第４のＭＩＸ回路、
９―１〜９―４は第１〜第４の局部発振器、１０
―１〜１０―４は第１〜第４の検波回路、１１―
１〜１１―４は第１〜第４の遅延回路、１２は同
期信号発生回路、１３は最大レベル検出回路、１
４は比較回路、１５は受信機を示している。 FIG. 1 is a block diagram of a synchronization detection circuit according to an embodiment of the present invention, FIG. 2 is a diagram for explaining the operation of a comparison circuit according to an embodiment, and FIG. 3 is a block diagram of a conventional hopping radio device. FIG. 4 is a timing diagram for explaining the operation of the hopping radio device. In the figure, 1 is a high frequency amplifier, 2 is a main MIX
circuit, 3 is a variable local oscillator, 4 is an intermediate frequency amplifier, 5 is a detection circuit, 6 is a speaker, 7 is a synchronization detection circuit, 8-1 to 8-4 are first to fourth MIX circuits,
9-1 to 9-4 are first to fourth local oscillators, 10
-1 to 10-4 are first to fourth detection circuits, 11-
1 to 11-4 are first to fourth delay circuits, 12 is a synchronization signal generation circuit, 13 is a maximum level detection circuit, 1
4 represents a comparison circuit, and 15 represents a receiver.

Claims

[Claims for Utility Model Registration] A hopping radio device that includes a synchronization detection circuit 7 that detects synchronization radio waves consisting of a plurality of frequency bands and outputs a synchronization signal, and receives a hopping radio frequency using the synchronization signal, A maximum level detection circuit 13 detects the maximum level in the synchronization radio wave in the synchronization detection circuit 7, and compares the detected maximum level with other detection levels,
A frequency hopping radio device characterized in that it is further equipped with a comparison circuit 14 that stops outputting the synchronization signal when the level difference is equal to or higher than a predetermined level.