Patent ID: 8724736
Filing Date: 2014-05-13
Classification: H03F,H03G

Abstract:
1. A multi-standard transmitter core, comprising a filter for receiving and filtering a differential transmission signal in accordance with a first standard of at least two different communication standards, the filter providing a differential filtered transmission signal; a mixer for receiving and upconverting the differential filtered transmission signal with an adjusted oscillator frequency for the first standard, the mixer providing a differential upconverted transmission signal; a digital variable gain amplifier (DVGA) for receiving the differential upconverted transmission signal and applying a gain factor to provide a first differential output signal for the first standard wherein the filter, mixer, and digital variable gain amplifier provide a first path for providing the first differential output signal; a digital driver circuit for providing a second differential output signal corresponding to a second of the at least two communication standards in response to a digital transmission signal in accordance with the second standard wherein the digital driver circuit provides a second path for providing the second differential output signal; a transformer; and a switch circuit for receiving the first and second differential output signals and selectively supplying one of the first differential output signal and the second differential output signal to the transformer, the transformer having a primary coil and a secondary coil for converting one of the first differential output signal and the second differential output signal to a single-ended output signal.