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Considered that the dual band sensor system is the most popular design at present, this study discussed the design of a dual-band hybrid array readout circuit. The direct injection circuit structure was used in the unit pixel. The design, simulation, and layout were conducted in the 40um×40um unit pixel to complete middle and long waveband signal readouts, in order to achieve one sensor unit with...
A system is composed of 64 channels of analog front-end pulser/receiver, 64 channels of Time-Gain Compensation (TGC), 64 channels of high-speed digitizer, and DSP-based beamformer implementation. The data are transferred to a PC via an Ethernet card. The system provides 64 channels of excitation pulsers while receiving simultaneously at a 120–200 MHz sampling rate at 12-bit resolution. The digitized...
A readout circuit for the linear array pH sensor was designed and developed, using chopper stabilization technique. It consisted of analog multiplexer, chopper stabilized operational amplifier, level shift, filter and buffer stage. The operational amplifier used in this design was a folded cascade amplifier. Results showed that the circuit can reduce input offset, drift voltage and noise. Moreover,...
In this design, an Ambric's Massively Parallel Processor Array (MPPA), which includes 336 asynchronous processors and communicates through a configurable structure of channels with a 128-bit high speed (100MHz) Input/Output (I/O) port, is used to implement the 64-channel digital beamformer. Besides the beamformer, the system is composed of 256-channel analog front-end pulser/receiver, 64-channel of...
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