Patent ID: 6605997
Filing Date: 2003-08-12
Classification: H03F

Abstract:
A differential receiver, wherein the differential receiver receives differential data signals at a differential positive terminal and a differential negative terminal, the differential receiver comprising:a differential signal detector having a first input terminal and a second input terminal, wherein an output signal is produced on an output terminal when a differential signal is detected on the first and second input terminals; a first differential amplifier having an output terminal coupled to the first input terminal, the first differential amplifier comprising a first differential input terminal and a second differential input terminal, wherein an input impedance at the first differential input terminal of the first differential amplifier is substantially different than an input impedance of the second differential input terminal of the first differential amplifier at an input frequency of interest; and a second differential amplifier having an output terminal coupled to the second input terminal, the second differential amplifier comprising a first differential input terminal and a second differential input terminal, wherein an input impedance at the first differential input terminal of the second differential amplifier is substantially different than an input impedance of the second differential input terminal of the second differential amplifier at an input frequency of interest; wherein, the first differential input terminal of the first differential amplifier and the second differential input terminal of the second differential amplifier are coupled to the differential positive terminal, and the second differential input terminal of the first differential amplifier and the first differential input terminal of the second differential amplifier are coupled to the differential negative terminal, wherein the resulting input impedance at the differential positive terminal is substantially equal to the resulting input impedance at the differential negative terminal.