JPS5733837A - Receiving equipment - Google Patents

Receiving equipment

Info

Publication number
JPS5733837A
JPS5733837A JP10994080A JP10994080A JPS5733837A JP S5733837 A JPS5733837 A JP S5733837A JP 10994080 A JP10994080 A JP 10994080A JP 10994080 A JP10994080 A JP 10994080A JP S5733837 A JPS5733837 A JP S5733837A
Authority
JP
Japan
Prior art keywords
signal
band width
output
input level
band
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
JP10994080A
Other languages
Japanese (ja)
Inventor
Katsura Tsushima
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP10994080A priority Critical patent/JPS5733837A/en
Publication of JPS5733837A publication Critical patent/JPS5733837A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/24—Automatic control in frequency-selective amplifiers

Landscapes

  • Noise Elimination (AREA)

Abstract

PURPOSE:To elevate an S/N ratio in an output of a demodulator,by narrowing the passing band width in a band pass filter, and effectively lowering a thermal agitation noise, in case when an input level of a signal has been lowered. CONSTITUTION:A signal which has been inputted to an input part 1 is frequency- converted by a frequency conversion part 2, and also is amplified by an intermediate frequency amplifying part 3. An output of the intermediate frequency amplifying part 3 is limited as to its band by a band width variable type band pass filter 40, an unnecessary noise is suppressed, and after that, it is demodulated by a demodulator 5, and its original signal is outputted. The filter 40 is capable of controlling its passing band width, is controlled by an output of an input level detector 6, and is operated so as to narrow the passing band width whenever a signal input level is lowered.
JP10994080A 1980-08-08 1980-08-08 Receiving equipment Pending JPS5733837A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10994080A JPS5733837A (en) 1980-08-08 1980-08-08 Receiving equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10994080A JPS5733837A (en) 1980-08-08 1980-08-08 Receiving equipment

Publications (1)

Publication Number Publication Date
JPS5733837A true JPS5733837A (en) 1982-02-24

Family

ID=14522961

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10994080A Pending JPS5733837A (en) 1980-08-08 1980-08-08 Receiving equipment

Country Status (1)

Country Link
JP (1) JPS5733837A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58184940U (en) * 1982-05-31 1983-12-08 オンキヨー株式会社 front end circuit
JPS60216681A (en) * 1984-04-12 1985-10-30 Sony Corp Fm demodulating circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52117012A (en) * 1976-03-29 1977-10-01 Hitachi Denshi Ltd S/n improvement
JPS5374816A (en) * 1976-12-15 1978-07-03 Nec Corp Receiver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52117012A (en) * 1976-03-29 1977-10-01 Hitachi Denshi Ltd S/n improvement
JPS5374816A (en) * 1976-12-15 1978-07-03 Nec Corp Receiver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58184940U (en) * 1982-05-31 1983-12-08 オンキヨー株式会社 front end circuit
JPH0127303Y2 (en) * 1982-05-31 1989-08-15
JPS60216681A (en) * 1984-04-12 1985-10-30 Sony Corp Fm demodulating circuit

Similar Documents

Publication Publication Date Title
JPS5793704A (en) Fm demodulation circuit
JPS5233460A (en) Fm demodulator
JPS5733837A (en) Receiving equipment
EP0234103A3 (en) Tuner circuit
JPS5370649A (en) Pulse width modulating and amplifying circuit
JPS5733836A (en) Automatic noise reducing circuit
JPS5757036A (en) Spectrum diffusion receiver
JPS56103523A (en) Active filter circuit
JPS5289046A (en) Automatic balanced amplification circuit
JPS5443448A (en) Compressor
JPS56107648A (en) Noise reduction circuit
JPS5733838A (en) Signal intensity detecting circuit
JPS5350885A (en) Fluorescence photometer
JPS54157018A (en) Fm receiver
JPS5647112A (en) Am receiver
JPS52105711A (en) Fm receiver
JPS5412208A (en) Gain-stabilized transmitter
JPS5595877A (en) Noise intensity measuring device
JPS52149468A (en) Fm demodulating circuit
JPS53148380A (en) Multi-stage amplifying circuit of differential type
JPS5366323A (en) Frequency control circuit
JPS5772407A (en) Amplifying circuit
JPS54152414A (en) Squelch system of fm mobile radio equipment
JPS56104547A (en) Noise eliminating circuit
JPS57176868A (en) Carrier extracting circuit