Power detector utilizing bias voltage divider for precision control of an amplifier

摘要: A controlled-output amplifier circuit whose output power may be maintained at a number of predetermined levels over wide ambient temperature range. The includes controllable gain stage, and level detector consisting diode linear voltage divider. divider is preferably composed two resistors, with first resistor being connected in series between direct current (DC) the anode diode, second cathode ground reference point. Preferably, resistance much greater than that resistor. This insures bias sufficiently small so any effects variation are attenuated to an acceptably level. Additionally, resistors have coefficients such effect rate change forward drop respect reduced by ratio