Kenneth G Brewer

US Patent:

20200366202, Nov 19, 2020

Filed:

Jul 24, 2020

Appl. No.:

16/938789

Inventors:

- CARLSBAD CA, US
KENNETH V BUER - GILBERT AZ, US
KENNETH P BREWER - MESA AZ, US
STEVE L KENT - CHANDLER AZ, US
SATEH JALALEDDINE - PHOENIX AZ, US

Assignee:

VIASAT, INC. - CARLSBAD CA

International Classification:

H02M 3/158
H03F 1/32

Abstract:

Circuits and methods for reducing the cost and/or power consumption of a user terminal and/or the gateway of a telecommunications system that may include a telecommunications satellite. Embodiments include “chained” feedback-regulated voltage supply circuits. These circuits substantially eliminate the need for separate regulator circuits for each regulated voltage. These circuits are designed to automatically maintain a substantially constant first voltage at a first node for a first load and maintain a substantially constant second voltage at a second node for a second load. Some disclosed configurations of these circuits may be useful to achieve greater current capability at the same voltage without requiring larger switches and higher inductor and capacitor sizes that may be needed in a single (conventional) stage voltage supply circuit.

US Patent:

20180241347, Aug 23, 2018

Filed:

Aug 12, 2016

Appl. No.:

15/752172

Inventors:

- CARLSBAD CA, US
KENNETH V BUER - GILBERT AZ, US
KENNETH P BREWER - MESA AZ, US
STEVE L KENT - CHANDLER AZ, US
SATEH JALALEDDINE - PHOENIX AZ, US

Assignee:

VIASAT, INC. - CARLSBAD CA

International Classification:

H03F 1/02
H03F 3/19
H03F 3/24
H03F 1/32
H04B 1/04
H04B 17/13

Abstract:

Circuits and methods for reducing the cost and/or power consumption of a user terminal and/or the gateway of a telecommunications system () that may include a telecommunications satellite. Embodiments generate a dynamic input bias signal based upon an information signal envelope (which may be pre-distorted) which is applied to the signal input of a power amplifier (PA), thus reducing average power consumption. Other embodiments further include dynamic linearization () of the information signal, and/or variation of the supply voltage to the power amplifier (PA) as a function of the envelope of the information signal. Another aspect is a multi-stage “chained” feedback regulated voltage supply circuit for providing two or more output voltages that may be used as alternative supply voltages to a power amplifier (PA).