ES296901U - Transmitter for lincompex radio telephone system - Google Patents

Transmitter for lincompex radio telephone system

Info

Publication number
ES296901U
ES296901U ES1985296901U ES296901U ES296901U ES 296901 U ES296901 U ES 296901U ES 1985296901 U ES1985296901 U ES 1985296901U ES 296901 U ES296901 U ES 296901U ES 296901 U ES296901 U ES 296901U
Authority
ES
Spain
Prior art keywords
channel signal
voice
control
level
amplitude
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.)
Granted
Application number
ES1985296901U
Other languages
Spanish (es)
Other versions
ES296901Y (en
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 filed Critical
Publication of ES296901U publication Critical patent/ES296901U/en
Application granted granted Critical
Publication of ES296901Y publication Critical patent/ES296901Y/en
Expired legal-status Critical Current

Links

Landscapes

  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

PURPOSE:To control to make the synthesized level of an voice channel signal and a control channel signal almost constant, by detecting the level of the voice channel signal, through the provision of a rectifying circuit at the output side of a frequency converter. CONSTITUTION:The voice signal from a microphone 1 detects the amplitude of envelope of voice with an amplitude detecting circuit 2, and compresses the variation of amplitude of voice with an amplitude compressor 3. The voice signal compressing the amplitude is converted into a suitable frequency with a crystal oscillator 4 and a frequency converter 5. A rectifying circuit 22 detects the level of an voice channel signal to control the gain of a gain control amplifier 23 provided at the output side of an FM modulator 7, and when the level of the voice channel signal is small, the level of a control channel signal is increased and control is made so as to make the output level of a synthesis circuit 9 synthesized at the voice channel signal and the control channel signal almost constant. Thus, the noise at nonsound of receiver is reduced and an automatic gain control with stable and quick speed is feasible.
ES1985296901U 1980-07-29 1985-11-14 PERFECTED TROUSERS. Expired ES296901Y (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10489980A JPS5730426A (en) 1980-07-29 1980-07-29 Transmitter for lincompex radio telephone system

Publications (2)

Publication Number Publication Date
ES296901U true ES296901U (en) 1988-04-01
ES296901Y ES296901Y (en) 1988-11-16

Family

ID=14392985

Family Applications (1)

Application Number Title Priority Date Filing Date
ES1985296901U Expired ES296901Y (en) 1980-07-29 1985-11-14 PERFECTED TROUSERS.

Country Status (2)

Country Link
JP (1) JPS5730426A (en)
ES (1) ES296901Y (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907217A (en) * 1988-09-12 1990-03-06 Amaf Industries, Inc. System and method of transmitting a complex waveform over a communication channel utilizing lincompex techniques
US5065451A (en) * 1989-06-09 1991-11-12 Amaf Industries, Inc. System and method of frequency calibration in a linked compression-expansion (lincompex) system

Also Published As

Publication number Publication date
ES296901Y (en) 1988-11-16
JPS5730426A (en) 1982-02-18

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Legal Events

Date Code Title Description
FD1K Utility model lapsed

Effective date: 19970303