Patent ID: 6684065
Filing Date: 2004-01-27
Classification: H03F,H03G,H04B

Abstract:
An integrated communications system comprising:a substrate; a receiver disposed on the substrate for converting a received signal to an IF signal; a VGA for low voltage applications coupled to the receiver for processing the IF signal, the VGA including a bank pair having a first bank of differential pairs of transistors and a second bank of differential pairs of transistors, the bank pair being cross-coupled in parallel, the IF signal being applied to the bank pair decoupled from a control signal used to control transconductance output gain of the bank pair over a range of input voltages; a digital IF demodulator disposed on the substrate and coupled to the VGA for low voltage applications for converting the IF signal to a demodulated baseband signal; and a transmitter disposed on the substrate operating in cooperation with the receiver to establish a two way communications path.