JPS59149741U - Receiving machine - 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 the drawing]

第１図は従来の受信機の一例を示す要部回路図、第２図
は第１図の特性図、第３図はこの考案による受信機の一
実施例を示す回路図、第４図は第３図に示す回路の特性
図、第５図は第３図に示す検波出力制御回路の具体的回
路の一例を示す回路図である。 １・・・・・・中間周波フィルタ切換回路、２・・・・
・・中間周波増幅器、３・・・・・・検波回路、４・・
・・・・検波出力制御回路。FIG. 1 is a circuit diagram of the main parts of an example of a conventional receiver, FIG. 2 is a characteristic diagram of FIG. 1, FIG. 3 is a circuit diagram of an embodiment of a receiver according to this invention, and FIG. A characteristic diagram of the circuit shown in FIG. 3, and FIG. 5 is a circuit diagram showing an example of a specific circuit of the detection output control circuit shown in FIG. 1...Intermediate frequency filter switching circuit, 2...
...Intermediate frequency amplifier, 3...Detection circuit, 4...
...Detection output control circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 制御信号によりナローとワイドに切換えられる中間周波
フィルタ切換回路と、この中間周波フィルタ切換回路の
出力を増幅する中間周波増幅器と、この中間周波増幅器
の出力信号を検波してオーディオ信号を出力する検波回
路とを有する受信機において、前記検波回路の出力側に
前記制御信号に応じて利得を変えるための検波回路の出
力回路を設け、ナローとワイドの切換えに伴なうオーデ
ィオ出力の変化を防止したことを特徴とする受信機。An intermediate frequency filter switching circuit that can be switched between narrow and wide by a control signal, an intermediate frequency amplifier that amplifies the output of this intermediate frequency filter switching circuit, and a detection circuit that detects the output signal of this intermediate frequency amplifier and outputs an audio signal. In the receiver, an output circuit of the detection circuit for changing the gain according to the control signal is provided on the output side of the detection circuit to prevent changes in audio output due to switching between narrow and wide. A receiver featuring: