ADJUSTMENT OF BIAS CURRENT IN A FIRST INTEGRATED C

专利名称：ADJUSTMENT OF BIAS CURRENT IN A FIRST

INTEGRATED CIRCUIT BASED ON A SIGNALGAIN OF A SECOND INTEGRATED CIRCUIT

发明人：WALKER, Brett, C.,ZEISEL, Eric申请号：EP01979670.5申请日：20011009公开号：EP134A2公开日：20031126

摘要：A technique of adjusting the bias current of an active circuit in a transmit signalpath based on the signal gain(s) of variable gain element(s) located prior to the activecircuit. The technique is particularly advantageous when the gain element(s) are locatedon one IC (e.g., that implements an IF portion) and the active circuit is implemented onanother IC (e.g., that implements a RF portion). The bias current of the active circuit is setbased, in part, on the input power level, which may be inferred from the gain controlsignal(s) used to control the preceding variable gain elements. Initially, at least one gaincontrol signal. A bias current for the active circuit is then determined based, in part, onthe estimated input signal level. The active circuit is biased with the determined biascurrent. The biased current can be limited to a range defined by an upper bias currentand a lower bias current.

申请人：QUALCOMM INCORPORATED

地址：5775 Morehouse Drive San Diego, CA 92121-1714 US

国籍：US

代理机构：Walsh, Michael Joseph

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