US Patent Application 17885001. REAL-TIME DC-BALANCE AWARE AFE OFFSET CANCELLATION simplified abstract
Contents
REAL-TIME DC-BALANCE AWARE AFE OFFSET CANCELLATION
Organization Name
Inventor(s)
Anup P. Jose of San Jose CA (US)
Sam Ray of Morgan Hill CA (US)
Ali Fazli Yeknami of San Jose CA (US)
Amir Amirkhany of Santa Clara CA (US)
REAL-TIME DC-BALANCE AWARE AFE OFFSET CANCELLATION - A simplified explanation of the abstract
- This abstract for appeared for US patent application number 17885001 Titled 'REAL-TIME DC-BALANCE AWARE AFE OFFSET CANCELLATION'
Simplified Explanation
The abstract describes a receiver for a serial data link. It includes an analog front end (AFE) with a continuous-time linear equalizer (CTLE) that receives a signal from a transmitter. The CTLE has two output nodes, and there are programmable tail current sources that can adjust the direct current (DC) offset between these nodes. The receiver also has a calibration circuit, which consists of a slicer that calculates the difference between the average output voltages of the two nodes, and a calibration counter that increments or decrements an offset count based on this difference. The programmable tail current sources are then adjusted according to the value of the offset count.
Original Abstract Submitted
A receiver for a serial data link, including an analog front end (AFE) including a continuous-time linear equalizer (CTLE) configured to receive an input signal from a transmitter, the CTLE including a first output node; a second output node; a plurality of programmable tail current sources configured to adjust a direct current (DC) offset between the first output node and the second output node; and a calibration circuit including: a slicer configured to output a difference between a first average output voltage corresponding to the first output node and a second average output, voltage corresponding to the second output node; and a calibration counter configured to increment or decrement an offset count based on the difference, wherein the plurality of programmable tail current sources are adjusted based on a value of the offset count.
