CPC H03F 1/0227 (2013.01) [G01R 19/04 (2013.01); H03K 5/1532 (2013.01)] | 21 Claims |
1. A circuit for modulating a power supply voltage provided to a plurality of amplifiers, the circuit comprising:
a peak detection circuit to receive respective analog input voltages provided to the plurality of amplifiers, and to detect and output information regarding a maximum instantaneous analog input voltage from the received respective analog input voltages; and
a summing circuit to output a sum of the information regarding the maximum instantaneous analog input voltage output from the peak detection circuit and an amplifier headroom voltage,
wherein a reference voltage is provided to the power supply voltage responsive to the output sum.
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