Symmetric linear equalization circuit with increased gain

摘要

Circuits providing low noise amplification with continuous time linear equalization are described. An exemplary circuit includes four amplification elements, such as MOS transistors. The amplification elements are arranged in differential pairs, and the differential pairs are cross-coupled with a frequency-dependent coupling, such as a capacitive coupling, to enhance high-frequency gain. The outputs of the amplification elements are combined to provide an output representing inverted and un-inverted sums of differences in the input signals.

主权项

1. A method comprising:
receiving first and second input signals at non-inverting inputs of first and second amplifier elements, respectively, the first and second input signals corresponding to symbols of a codeword; cross-coupling the first and second input signals to frequency-dependent inverting inputs of the second and first amplifier elements, respectively; and, generating an amplified codeword identification signal using the first and second amplifier elements, the first and second amplifier elements providing a gain corresponding to a combination of common-source gain and common-gate gain, the common-source gain applied to the non-inverting inputs and the common-gate gain applied to the inverting inputs, the amplified codeword identification signal used at least in part to determine a set of output bits represented by the symbols of the codeword.