The embodiments of the present invention provide a direc tional coupler Switchable
between a normal state and a bypass state. In one embodiment, the directional coupler …

An ampli? er receives an amplitude signal of a polar modu lated signal at a base terminal of
a transistor and receives a phase modulated carrier signal of the polar modulated signal at …

ABSTRACT A method for calibrating the output poWer of a mobile termi nal using at least a
second order curve? t to describe a poWer ampli? er gain (PAG) setting versus output …

This is a Continuation-In-Part application of and claiming priority to US patent applications
Ser. No. 10/717,986, filed Nov. 20, 2003; now US Pat. No. 6,937,848 and Ser. No …

(57) ABSTRACT A transmission device and method are shown, Wherein an ampli? cation is
implemented Which can be changed between a sWitched operation mode and linear …

US7336753B2 - Transmitter - Google Patents US7336753B2 - Transmitter - Google Patents
Transmitter Download PDF Info Publication number US7336753B2 US7336753B2 US10/603,860 …

BACKGROUND 0002 There are many benefits to using polar modulation as a means of
transmitting information. Polar modulation makes possible the application of the amplitude …

Predistorting an input signal prior to amplification in an RF power amplifier (206) includes
isolating a plurality sub-band signals, each representing a portion of the input signal s (t) …

The addition of 8PSK modulation to the GSM standard creates the need for architectural
modifications to achieve necessary performance while maintaining a cost-effective solution …

5,021,754 A* 6/1991 Shepherd et al............. 332/128 5,633,893 A 5/1997 Lampe et
al................ 375,297 5,952,895 A 9/1999 McCune, Jr. et al......... 332/128 6,011,815. A 1/2000 …