Abstract: In one aspect, a fingerprint sensor device for fingerprint detection includes a light source configured to emit light at a wavelength. The fingerprint sensor device includes an array of sensor pixels to acquire an optical image indicative of a fingerprint. Each sensor pixel includes a photodetector to detect the emitted light reflected off of a target finger and output an optical signal based on the detected reflected light. Each sensor pixel includes a collimator disposed over the photodetector to direct the reflected light in a substantially vertical direction from above the photodetector toward the photodetector. Each sensor pixel includes sensor signal detection circuitry communicatively coupled to the photodetector to acquire the outputted optical signal.

Abstract: In one aspect, a fingerprint sensor device for fingerprint detection includes a light source configured to emit light at a wavelength. The fingerprint sensor device includes an array of sensor pixels to acquire an optical image indicative of a fingerprint. Each sensor pixel includes a photodetector to detect the emitted light reflected off of a target finger and output an optical signal based on the detected reflected light. Each sensor pixel includes a collimator disposed over the photodetector to direct the reflected light in a substantially vertical direction from above the photodetector toward the photodetector. Each sensor pixel includes sensor signal detection circuitry communicatively coupled to the photodetector to acquire the outputted optical signal.

Abstract: A predicted parallel branch slicer for use in an adaptive decision feedback equalizer includes Mk adders commonly receiving a signal to be processed and respectively receiving Mk preset values, and performing respective addition operations to generate Mk output signals; Mk slicers in communication with the Mk adders, receiving and processing the Mk output signals to obtain Mk signals of Mk levels, respectively; a multiplexer in communication with the Mk slicers, receiving the signals of the Mk levels; and k delay units interconnected with one another in series and being in communication with the multiplexer, and generating k selection signals of different delay time in response to an output of the multiplexer, the selection signals being provided for the multiplexer to select one of the signals of the Mk levels to be outputted.

Abstract: A predicted parallel branch slicer for use in an adaptive decision feedback equalizer includes Mk adders commonly receiving a signal to be processed and respectively receiving Mk preset values, and performing respective addition operations to generate Mk output signals; Mk slicers in communication with the Mk adders, receiving and processing the Mk output signals to obtain Mk signals of Mk levels, respectively; a multiplexer in communication with the Mk slicers, receiving the signals of the Mk levels; and k delay units interconnected with one another in series and being in communication with the multiplexer, and generating k selection signals of different delay time in response to an output of the multiplexer, the selection signals being provided for the multiplexer to select one of the signals of the Mk levels to be outputted.

Abstract: A fast convergent pipeline adaptive decision feedback equalizer using a post-cursor processing filter is disclosed, which includes a feed-forward equalizer, a post-cursor processing filter, an adder, a slicer, a register, a pipelined feedback equalizer, a subtractor and a updating device. The pipelined feedback equalizer has a delay device coupled to the register for delaying its output signal, and a feedback equalizer coupled to the delay device for eliminating the post-cursor of the output signal. By using the post-cursor processing filter (PCF), it increases the operating clock rate with arbitrary speedup factor, and improves the convergence rate of the overall system.