公开(公告)号：US11929715B2

公开(公告)日：2024-03-12

申请号：US17336504

申请日：2021-06-02

Applicant: Microchip Technology Incorporated

Inventor： Rohit Tirumala ,  Miguel Salcedo ,  Donald Humbert

IPC: H03F3/04 ,  G01R19/04 ,  H03F1/02 ,  H03K5/1532

CPC classification number: H03F1/0227 ,  G01R19/04 ,  H03K5/1532

Abstract: A circuit to modulate the power supply to track input or output voltages provided to or output by a plurality of amplifiers to reduce power dissipation is provided. The circuit may include a peak detection circuit configured to receive a plurality of voltages respectively corresponding to the plurality of amplifiers, and to detect and output information regarding a maximum instantaneous voltage from the received plurality of voltages, and a summing circuit configured to output a sum of the information regarding the maximum instantaneous voltage and an amplifier headroom voltage. A reference voltage may be provided for the supply voltage responsive to the output sum. The circuit may also include a scaling circuit configured to scale the output sum, and the reference voltage may be a scaled reference voltage output by the scaling circuit.