Patent ID: 7031689
Filing Date: 2006-04-18
Classification: H04B

Abstract:
1. A differential radio comprising: a differential antenna having an input and an output; a differential duplexer including film bulk acoustic resonators, generating tow receiving signals and receiving two transmitting signals, electrically connected to the input and output of the differential antenna; a differential low noise amplifier, receiving the two receiving signals, generating two LNA signals, including, an input matching network (IMN) having a differential input and a first and second IMN output; a first capacitor, connected to the drain of the first FET; a second FET, having a gate connected to the first capacitor; a third FET, having a source connected to the source of the second FET; an output matching network (OMN), having a first input connecting to the drain of the second FET and a second input connecting to the drain of the third FET; a first inductor connecting between the source of the second FET and ground; a second capacitor connected to the gate of the third FET; a fourth FET having a drain connected to the second capacitor, a gate connected to the second IMN output, a source connected to the source of the first FET; and a second inductor connects between the source of the first FET and ground; a differential filter receiving the two LNA signals and generating a first differential filter signal; a first differential mixer receiving the first differential signal and generating a first differential mixer output signal; a signal, processing section, receiving the first differential mixer output signal, generating a conditioned differential signal; a second differential mixer, receiving the conditioned differential signal, generating a second differential mixer output signal; a second differential filter, receiving the second differential mixer output signal, generating a second differential filter signal; and a differential power amplifier receiving the second differential filter signal and generating the two transmitting signals.