发明名称 |
An arrangement for eliminating offset errors in a power control circuit of a pulsed transmitter final amplifier. |
摘要 |
<p>A high frequency power amplifier (10) amplifies periodic signals in the form of HF bursts. The power output of the amplifier is adjusted by a control loop (20) which produces a control signal in response to a comparison made between a set-point value (BV) and the actual power output (Put) of the amplifier and applies the signal to the power amplifier. The control loop includes a differential amplifier (25). A correction circuit (40) measures the output voltage of the differential amplifier over a time period (t1 to t2 ) prior to each HF burst and stores in a memory (C) a magnitude proportional to this output voltage. During the following HF burst, this magnitude is used to introduce into the control loop a correction magnitude (Ukorr) for correction of offset voltages (Uoff) occurring in the control loop.</p> |
申请公布号 |
EP0561754(A1) |
申请公布日期 |
1993.09.22 |
申请号 |
EP19930850040 |
申请日期 |
1993.03.05 |
申请人 |
ERICSSON - GE MOBILE COMMUNICATIONS INC. |
发明人 |
CARLSSON, JOHN TORSTEN |
分类号 |
H04B1/04;H03F1/30;H03G3/20;H04B7/26 |
主分类号 |
H04B1/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|