Decision feedback equalizer with high input sensitivity and improved performance for signal processing
Abstract:
A decision feedback equalizer (DFE) may include a summer configured to receive a signal stream, and a plurality of feedback taps including a first feedback tap connected to the summer. The first feedback tap may include a pre-amplifier, a combined latch and a digital to analog converter (DAC). The pre-amplifier may be configured to be clocked by a first clock signal, wherein the pre-amplifier may be configured to receive an output signal of the summer and to receive a first postcursor generated by the DFE of a previous signal in the signal stream. The combined latch may be configured to be clocked by a first clock signal and a second clock signal. The DAC may be coupled to an output node of the combined latch. The first postcursor may be provided to the pre-amplifier without being provided to the summer.
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