Patent ID: 6377315
Filing Date: 2002-04-23
Classification: H01F,H01L,H03B,H03D,H03F,H03G,H03H,H03J,H03L

Abstract:
An integrated receiver comprising:a substrate providing a physical medium upon which a receiver circuit is disposed; a first local oscillator; a second local oscillator; a mixer having its circuit elements disposed upon the substrate for converting a received signal to a first IF using the first local oscillator's output to mix the received signal with; a first buffer amplifier having its circuit elements disposed upon the substrate cascaded after the mixer; an external first differential filter assembly coupled to the first buffer amplifier output for removing an image distortion from the first IF and removing unwanted channels; a second buffer amplifier having its circuit elements disposed upon the substrate coupled to the external first differential filter assembly output; a first I/Q mixer disposed upon the substrate for converting the first IF to a second IF I and Q signal and rejecting a first IF image distortion; a polyphase circuit for combining the second IF I and Q signals into a second IF signal; a third buffer amplifier having its circuit elements disposed upon the substrate and cascaded with the polyphase circuit; and an external second differential filter assembly coupled to the third buffer amplifier output for removing an image distortion from the second IF and removing unwanted channels; whereby frequency conversion, channel selectivity and image rejection are performed on the integrated circuit.