Patent ID: 9148960
Filing Date: 2015-09-29
Classification: G02B,H04B,H05K,Y10T

Abstract:
1. A receiver optical assembly (ROA), comprising: a photo-detector disposed in an optical header packaging, the photo-detector configured to detect and convert input optical signals into output electrical signals; a complementary metal oxide semiconductor (CMOS)-based differential transimpedance amplifier (TIA) circuit disposed in an integrated circuit remotely located from the optical header packaging, the CMOS-based differential TIA circuit comprising a first differential input node and a second differential input node, and the CMOS-based differential TIA circuit having a TIA input impedance of at least ten (10) ohms to reduce a ringing effect over the first differential input node and the second differential input node; and a transmission circuit comprised of a first transmission line coupled to the first differential input node, and a second transmission line coupled to the second differential input node; a first node of the photo-detector coupled to the first transmission line and a second node of the photo-detector coupled to the second transmission line to couple the photo-detector to the CMOS-based differential TIA circuit to amplify the output electrical signals received from the photo-detector.