The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 2005
Filed:
Jan. 08, 2001
Scott B. Davis, Walworth, WI (US);
Scott B. Davis, Walworth, WI (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A telematics communication system () receives an input supply voltage (Vin) () from a battery () charged by an alternator () in an automotive vehicle. The telematics communication system () includes a transceiver () having a transmitter () and a variable delta voltage tracking regulator (VDVTR) (). The VDVTR () provides a regulated output supply voltage (Vout) () to a power amplifier () in the transmitter () responsive to the input supply voltage () and a regulator control voltage (TX_EN) (). The VDVTR () has a first operating stage and a second operating stage, each controlled by a bias circuit (RRand R), and a third operating stage, controlled by a voltage limiting circuit (D) to eliminate alternator whine noise () that appears on the input supply voltage () and, in turn, appears on the regulated output supply voltage (Vout) ().