System and method for setting analog front end DC gain
AssigneeSamsung Display Co., Ltd.
InventorsGaurav Malhotra, Amir Amirkhany
Life of this patent
Estimating the term…
Abstract
A system and method for setting analog front end in a serial receiver. The serial receiver includes a decision feedback equalizer. During initialization, taps of the decision feedback equalizer other than the zeroth tap are disabled, and the zeroth tap is used to estimate the amplitude of the signal at the output of the analog front end. The analog front end gain is iteratively adjusted until the estimated value of the zeroth tap is within a set range.
Claims23
A receiver for a serial link, the receiver having an analog input and comprising:
- an analog front end connected to the analog input and having an output and an adjustable DC gain;
- a data slicer having an input coupled to the output of the analog front end, and an output;
- an error slicer having an input coupled to the output of the analog front end, and an output;
- and
- a processor circuit coupled to the outputs of the data slicer and the error slicer and configured to iteratively adjust the DC gain based on a respective estimate of a zeroth channel tap value until the zeroth channel tap value falls into a set range of values,
- wherein the estimating of the zeroth channel tap value comprises iteratively updating the estimated zeroth channel tap value, performing a plurality of iterations for each respective estimate of the zeroth channel tap value.
A display comprising:
- a transmitter;
- and
- a receiver connected to the transmitter, the receiver having an analog input comprising:
- an analog front end connected to the analog input and having an output and an adjustable DC gain;
- a data slicer having an input coupled to the output of the analog front end, and an output;
- an error slicer having an input coupled to the output of the analog front end, and an output;
- and
- a processor circuit coupled to the outputs of the data slicer and the error slicer and configured to iteratively adjust the DC gain based on a respective estimate of a zeroth channel tap value until the zeroth channel tap value falls into a set range of values,
- wherein the estimating of the zeroth channel tap value comprises iteratively updating the estimated zeroth channel tap value, performing a plurality of iterations for each respective estimate of the zeroth channel tap value.
A method of initializing a serial link comprising a transmitter and a receiver connected to the transmitter, the receiver having an analog input and comprising:
- an analog front end connected to the analog input and having an output and an adjustable DC gain;
- a data slicer having an input coupled to the output of the analog front end, and an output;
- an error slicer having an input coupled to the output of the analog front end, and an output;
- and
- a processor circuit coupled to the outputs of the data slicer and the error slicer,
- the method comprising:
- iteratively adjusting the DC gain, based on estimating, by the processor circuit, a respective zeroth channel tap value until the zeroth tap channel value falls into a set range of values,
- wherein the estimating of the zeroth channel tap value comprises iteratively updating the estimated zeroth channel tap value, performing a plurality of iterations for each respective estimate of the zeroth channel tap value.
Dependencies are inferred from the claim text.