JPS55105413A - Automatic gain control unit - Google Patents

Automatic gain control unit

Info

Publication number
JPS55105413A
JPS55105413A JP1299179A JP1299179A JPS55105413A JP S55105413 A JPS55105413 A JP S55105413A JP 1299179 A JP1299179 A JP 1299179A JP 1299179 A JP1299179 A JP 1299179A JP S55105413 A JPS55105413 A JP S55105413A
Authority
JP
Japan
Prior art keywords
omega
signal
output
frequency
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1299179A
Other languages
Japanese (ja)
Inventor
Hiroki Aizawa
Akira Namieno
Junichi Shibata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP1299179A priority Critical patent/JPS55105413A/en
Publication of JPS55105413A publication Critical patent/JPS55105413A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To vary the degree of amplification and compression according to the frequency by securing the dependence for the AGC action on the frequency of the input signal. CONSTITUTION:Input signal ei(omega) is amplified by variable gain amplifier VA which is controlled by comparison with control voltage VD obtained through detection of both reference voltage VR and output signal e0(omega). The output of the amplified input signal is amplified again through amplifier AMP featuring the desired frequency characteristics and then delivered in the form of output signal e0(omega). On the other hand, signal e0(omega) is detected by detector DET, and DC output voltage VD' correlating the size and frequency of signal e0(omega) is obtained at the output of the detector. This voltage VD' is then smoothed through time constant circuit TIM to be supplied to amplifier VA in the form of the control signal.
JP1299179A 1979-02-07 1979-02-07 Automatic gain control unit Pending JPS55105413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1299179A JPS55105413A (en) 1979-02-07 1979-02-07 Automatic gain control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1299179A JPS55105413A (en) 1979-02-07 1979-02-07 Automatic gain control unit

Publications (1)

Publication Number Publication Date
JPS55105413A true JPS55105413A (en) 1980-08-13

Family

ID=11820665

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1299179A Pending JPS55105413A (en) 1979-02-07 1979-02-07 Automatic gain control unit

Country Status (1)

Country Link
JP (1) JPS55105413A (en)

Similar Documents

Publication Publication Date Title
KR100190976B1 (en) High dynamic range closed loop automatic gain control system
JPS57138208A (en) Power detecting circuit and gain control circuit using it
SE8703822D0 (en) PROCEDURE AND CIRCUIT FOR AUTOMATIC AMPLIFY CONTROL OF A SIGNAL
CA2097729A1 (en) Power control device wherein a bias voltage in level detection is given a constant difference from a detected voltage
JPS55105413A (en) Automatic gain control unit
JPS5580936A (en) Optical receiving circuit
JPS5546672A (en) Transistor amplifier circuit
JPS558657A (en) Signal delay circuit
JPS5443448A (en) Compressor
JPS5583352A (en) Noise reduction unit on signal compression and expansion system
JPS5530300A (en) Gain control circuit
KR830007024A (en) TV automatic gain control system
JPS5669907A (en) Linear amplifier
JPS55156412A (en) Gain control circuit
JPS5437664A (en) Automatic gain adjusting circuit
JPS55153456A (en) Pulse transmission circuit
JPS5698913A (en) Temperature control circuit for amplifier
JPS57100362A (en) Ultrasonic wave measuring device
JPS5739632A (en) Signal compressor
JPS57188163A (en) Signal discriminator
JPS573409A (en) Agc circuit
JPS5678210A (en) Automatic gain control amplifier
JPS5733838A (en) Signal intensity detecting circuit
JPS5552609A (en) Amplifier for microwave
JPS6450982A (en) Deblocking circuit