JPS615031U - signal detection circuit - Google Patents

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

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の信号検出回路を示すブロック図、第２図
は第１図におけや−各部の波形を示す波形図、第３−は
この考案の一実施例を示すブロック図、第４図は第３図
における各部の波形を示す波形図である。 ４・・・積分回路、８・・・第１の振幅比較器、５・・
・第２の振幅比較器。Fig. 1 is a block diagram showing a conventional signal detection circuit, Fig. 2 is a waveform diagram showing waveforms of various parts in Fig. 1, Fig. 3 is a block diagram showing an embodiment of this invention, and Fig. 4 The figure is a waveform diagram showing the waveforms of each part in FIG. 3. 4... Integrating circuit, 8... First amplitude comparator, 5...
- Second amplitude comparator.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 雑音を含む信号の有無を所定の信号対雑音比で判定する
信号検出回路において、入力信号を第１の基準電圧と比
較し信号の有無を所定の信号対雑音比で検出する第１の
振幅比較器と、この第１の振幅比較器の出力を一定期間
積分する積分回路と、この積分回路の出力電圧を第２の
基準電圧と比較する第２の振幅比較器とを備えたことを
特徴とする信号検出回路。In a signal detection circuit that determines the presence or absence of a signal containing noise using a predetermined signal-to-noise ratio, a first amplitude comparison that compares an input signal with a first reference voltage and detects the presence or absence of a signal using a predetermined signal-to-noise ratio. the first amplitude comparator, an integrating circuit that integrates the output of the first amplitude comparator for a certain period of time, and a second amplitude comparator that compares the output voltage of the integrating circuit with a second reference voltage. signal detection circuit.