• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to radio engineering and can be used in radio communication systems. The purpose of the invention is to reduce nonlinear distortion while ensuring 100% modulation. The transmitter contains a key amplifier 1, a low-pass filter 2, a high-frequency (HF) output lamp amplifier 3 with a lamp 4, a source of carrier frequency 5, H in the main stage 6, a back-up unit 7, a correction unit 8, and amplitude modulus (AM4 9. Source 5 generates a carrier signal, the amplitude of which is modulated in AM 9 by an input low-frequency signal, which is preliminarily delayed in block 7 and corrected in block I. The non-damping signal is amplified in cascade b and fed to control grid Pampn 4. Source 5 together but with an amplifier 3 they form an RF circuit. Amplifier 1 of the PFA performs the function of the main modulator, the signal from which is fed through the filter to the anode of the lamp 4. The transmitter uses additional modulation of the carrier oscillation with AM 9 attenuator and impedance converter. Such combined modulation with respect to anode voltage and carrier signal provides 100% modulation, which is equivalent to reducing nonlinear distortion. 2 Il. (L & ate GO
    公开号:SU1655310A3
    申请号:SU874203650
    申请日:1987-11-12
    公开日:1991-06-07
    发明作者:Кириан Бохумил；Чол Вильгельм
    申请人:Ббц Аг Браун Бовери Унд Ко (Фирма)；
    IPC主号:
    专利说明:

    ГЈ
    权利要求:
    Claims (1)
    [1]
    The claims, an amplitude-modulated broadcast transmitter containing a key amplifier connected in series, which is designed as an approximator of the modulating function, and a low-pass filter, the output of which is connected to the anode voltage input of the lamp of a controlled high-frequency output tube amplifier, a carrier frequency source, a high-frequency exciting cascade , the output of which is connected to the control grid of the lamp of the controlled high-frequency output tube lamp, increase p, while the input The amplifier is the input of a low-frequency modulating signal, which is due to the fact that, in order to reduce whole-cell distortions while * providing 1 (): '% module of game, series-connected ep <h delays, a correction unit and an amplifier module, the other input of which, 0 is connected to the output of the carrier frequency source, the output of the amplitude frequency modulator is connected to the input of the high-current excitation cascade, while the amplitude modulator is made in forks of a series-connected attenuator and converter about accompanied givleniya and correction block is formed as a non-linear amplifier, amplifying the negative narrow myakennalι values by 20.
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    同族专利:
    公开号 | 公开日
    DE3769942D1|1991-06-13|
    DK608087A|1988-05-21|
    JPS63149920A|1988-06-22|
    YU208987A|1989-10-31|
    CS788387A2|1990-03-14|
    CA1279900C|1991-02-05|
    DK608087D0|1987-11-19|
    IN170404B|1992-03-21|
    CN1008039B|1990-05-16|
    CH671120A5|1989-07-31|
    CN87107974A|1988-06-01|
    ES2022265B3|1991-12-01|
    US4864635A|1989-09-05|
    EP0271703A3|1988-07-06|
    EP0271703B1|1991-05-08|
    EP0271703A2|1988-06-22|
    BG47800A3|1990-09-14|
    CS272229B2|1991-01-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4058769A|1974-07-05|1977-11-15|Alderman Robert J|Modulation system with carrier control|
    US4088956A|1976-02-27|1978-05-09|Axman Michael P|Automatic modulation percentage control for amplitude modulated transmitters|
    DE2935445A1|1979-08-09|1981-02-26|Bbc Brown Boveri & Cie|NF POWER AMPLIFIER|
    GB2060297B|1979-08-14|1983-09-01|Marconi Co Ltd|Modulating amplifiers|
    US4295106A|1979-10-04|1981-10-13|Leonard Kahn|Method and means for introducing additional asymmetry into audio waves|
    CH664655A5|1980-12-12|1988-03-15|Patelhold Patentverwertung|METHOD AND AMPLIFIER CIRCUIT FOR THE AMPLIFICATION OF ELECTRICAL SIGNALS, IN PARTICULAR LF MODULATION SIGNALS OF A BROADCASTING TRANSMITTER.|
    GB2117589B|1982-03-26|1985-10-16|Philips Electronic Associated|Polar loop transmitter|
    CH666374A5|1983-08-12|1988-07-15|Bbc Brown Boveri & Cie|AMPLITUDE-MODULATED TRANSMITTER WITH CONTROL OF THE CARRIER VALUE.|
    GB2150378B|1983-11-21|1987-06-03|Philips Electronic Associated|Polar loop transmitter|
    CH666148A5|1984-05-10|1988-06-30|Bbc Brown Boveri & Cie|METHOD FOR CARRIER CONTROL OF AN AMPLITUDE-MODULATED TRANSMITTER, AND CIRCUIT ARRANGEMENT FOR IMPLEMENTING THE METHOD.|US5175877A|1990-03-15|1992-12-29|Magnavox Electronic Systems Company|Apparatus and method for generating an amplitude modulated rf signal|
    ES2073647T3|1990-12-03|1995-08-16|Siemens Ag|MODULATION INSTALLATION FOR AN HF POWER AMPLIFIER.|
    EP0496009A1|1991-01-21|1992-07-29|Thomcast Ag|AM-Broadcast transmitter|
    US5396187A|1992-08-13|1995-03-07|Cti Pet Systems, Inc.|Amplitude-and rise-time-insensitive timing-shaping filters|
    JP3118419B2|1996-06-07|2000-12-18|株式会社ケンウッド|AM data multiplex modulator|
    US7095793B2|2000-01-07|2006-08-22|Mario Hieb|Digital exciter/phasor/transmitter for directional antennal system|
    CN104506240B|2014-12-31|2017-03-29|青岛海信宽带多媒体技术有限公司|A kind of optical module|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH466086A|CH671120A5|1986-11-20|1986-11-20|
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