Overload distortion protection for a wideband receiver
申请公布号:EP1179887(A2)
申请号:EP20010306291
申请日期:2001.07.23
申请公布日期:2002.02.13
发明人:EARLS, JEFFREY D.;DALEBROUX, DONALD J.;YAU, MAN-KIT
分类号:H03F1/52;H03G3/30;H04B1/10;(IPC1-7):H03G3/30;H04B1/28
主分类号:H03F1/52
摘要:<p>Overload distortion protection for a wideband receiver having a wideband variable gain input amplifier followed by a frequency conversion stage followed in turn by an intermediate frequency amplifier and detector to produce a measurement value in response to a signal input to the wideband variable gain input amplifier is achieved by detecting the peak power of the signal at the output of the wideband variable gain input amplifier and comparing it with the power output from the intermediate frequency amplifier and detector. If a threshold difference is exceeded, gain control signals for the wideband variable gain input and intermediate frequency amplifiers are adjusted for optimum dynamic range. If there is no range for adjusting the gain control signals, then a warning is provided to an operator to alert that the measurement value may contain distortion. <IMAGE></p>
Chirurgisches Nahtinstrument für minimalinvasive transendoskopische Ausführung von Einzelnähten
Tretlager-Momentmesseinrichtung
Nordsee Deich aus Plastik der schwer mit Wasser gefüllt dasteht
Speicherverbindungsnetzarchitektur für einen Vektorprozessor
Method for extraction of xanthohumol from hop vines
Telemedicine method and system for patient monitoring
Anti-icing system for electric traction