Patents by Inventor Zhong Kai Zhong

Zhong Kai Zhong has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for selectable DC to DC conversion
    Patent number: 5684682
    Abstract: A method and apparatus for DC-DC conversion. The apparatus includes a voltage detector (152) for detecting a voltage level in the circuit; a capacitive voltage doubler configuration of the DC to DC conversion circuits (130); a capacitive voltage tripler configuration of the DC to DC conversion circuits (130); selector circuitry (134) responsive to the voltage detector (152) for enabling the doubler or tripler configurations; and a voltage regulator (132) for regulating the converted DC voltages. The selector circuitry (134) initially enables the doubler, and then disables the doubler and enables the tripler when the voltage level drops below a reference voltage. In an alternate embodiment, high load signal HLVBB is provided when a high power load is to be enabled, such that the selector circuitry (134) temporarily disables the doubler and temporarily enables the tripler until the high load signal is inactive.
    Type: Grant
    Filed: July 19, 1995
    Date of Patent: November 4, 1997
    Assignee: Motorola, Inc.
    Inventors: Zhong Kai Zhong, Daniel Tran