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:
Dec. 03, 2002
Filed:
Jun. 01, 1999
James S. Mielke, Phoenix, AZ (US);
Albert H. Higashi, Lawrenceville, GA (US);
Serge Drogi, Phoenix, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A transceiver ( ) includes a transmitter ( ) that receives a digital data stream from a digital signal processor ( ) to delay lines ( ). The delay lines ( ) provide an address to a ROM look-up table ( ). Another input of the look-up table ( ) receives a signal that selects protocols such as TDMA, CDMA, and GSM. A multi-accumulator fractional-N synthesizer ( ) receives phase derivative coefficients and a DAC ( ) receives amplitude modulation coefficients from the look-up table ( ) based on the selected protocol. The analog output signals from the DAC ( ) and the synthesizer ( ) are received by a variable gain amplifier ( ) that generates an RF amplitude and frequency modulated output signal for transmission from the transmitter ( ).