JPS55100706A - Improvement system for transmitter distortion factor of fm radio equipment - Google Patents
Improvement system for transmitter distortion factor of fm radio equipmentInfo
- Publication number
- JPS55100706A JPS55100706A JP823079A JP823079A JPS55100706A JP S55100706 A JPS55100706 A JP S55100706A JP 823079 A JP823079 A JP 823079A JP 823079 A JP823079 A JP 823079A JP S55100706 A JPS55100706 A JP S55100706A
- Authority
- JP
- Japan
- Prior art keywords
- modulated
- amplitude
- wave
- level
- type automatic
- 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
Links
Landscapes
- Transmitters (AREA)
Abstract
PURPOSE: To secure an excellent transmitter distortion factor even in case of an overinput of more than a standard modulated-wave input level where a standard modulation degree can be obtained by providing a feedback type automatic level amplifier, which provides amplitude limitation without waveform distortion, in front of a saturated type amplitude limiter.
CONSTITUTION: A modulated wave is applied to input terminal 1, differentiating circuit 2 obtains an output level in proportion to a modulated-wave input frequency, and feedback type automatic level amplifier 8 holds frequency deviation below a fixed value, thereby bringing constant-level and waveform-distortionless amplitude limitation to effect. Further, saturated type amplitude liminter 3 performs instantaneous amplitude limitation that is impossible only by feedback type automatic level amplifier 8. Furthermore, integrating circuit 4 corrects distortion due to the differentiating circuit and low-pass filter 5 removes the out-band frequency component of the modulated wave. Then, the output of filter 5 is phase-modulated by modulator 7 by a carrier generated by crystal oscillator 6.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP823079A JPS55100706A (en) | 1979-01-29 | 1979-01-29 | Improvement system for transmitter distortion factor of fm radio equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP823079A JPS55100706A (en) | 1979-01-29 | 1979-01-29 | Improvement system for transmitter distortion factor of fm radio equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55100706A true JPS55100706A (en) | 1980-07-31 |
Family
ID=11687350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP823079A Pending JPS55100706A (en) | 1979-01-29 | 1979-01-29 | Improvement system for transmitter distortion factor of fm radio equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55100706A (en) |
-
1979
- 1979-01-29 JP JP823079A patent/JPS55100706A/en active Pending
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