Johnny N Klarenbeek

US Patent:

20200052683, Feb 13, 2020

Filed:

Aug 19, 2019

Appl. No.:

16/544477

Inventors:

- Dallas TX, US
Sungho Beck - Plano TX, US
Richard Turkson - Princeton TX, US
Johnny Klarenbeek - Dallas TX, US
Bixia Li - Plano TX, US

International Classification:

H03K 17/00
H03K 5/24

Abstract:

Channel switchover power multiplexer circuits, and methods of operating the same are disclosed. An example power multiplexer a first transistor coupled to a first input, a second transistor coupled to the first transistor to couple a first voltage at the first input to an output, a third transistor coupled to a second input, a fourth transistor coupled to the third transistor to couple a second voltage at the second input to the output, a diode amplifier to provide a third voltage to a gate of the first transistor to block a reverse current, and a soft-start amplifier to provide a fourth voltage to a gate of the fourth transistor to turn on (with adjustable VOUT ramp rate) the fourth transistor with a constant ramp rate.

US Patent:

20170244403, Aug 24, 2017

Filed:

Jun 30, 2016

Appl. No.:

15/198618

Inventors:

- Dallas TX, US
Johnny Klarenbeek - Dallas TX, US

International Classification:

H03K 17/081
H02M 3/07

Abstract:

A switch for controlling a power supply and a method of operating the switch are disclosed. The switch includes a first transistor having a drain and a source connected between Vand Vand a gate connected to be driven to a first voltage that is greater than V, an external capacitor operable, when connected to the gate of the first transistor, to control a rise time of V, and a circuit coupled to the gate of the first transistor and to the external capacitor, the circuit connected to couple the external capacitor to the gate of the first transistor responsive to an enable signal turning on and to uncouple the external capacitor from the gate of the first transistor responsive to the voltage on the gate reaching the first voltage.