Product Principle 4-5
Transmitting: in accomplishing the transmitting focus of the entire unit, TR_FPGA controls 64
channels on a single board to send high-voltage ultrasound signal to the probe.
Receiving: in accomplishing the receiving focus, TR_FPGA controls 64 channels on a single
board to receive ultrasound echo signal of the probe.
Beam data processing: is to receive the beam data which is weighted from the previous TR
board, and passes to the next TR board. Finally, it adds all beam data on array channels
together and sends it to engine board’s DSP_FPGA.
CW: it refers to the CW mini board on TR_A board. It fulfills the adjustment of CW based on
AFE plan. The adjustment result will send to TR_FPGA.
Pencil probe support: is available to fulfill the switch on TR_A board between the receiving
channel of the pencil probe and the regular receiving channel. It finally connects to CW mini
board.
Control: it is necessary to take controls to accomplish the functions, such as: Download the
parameters to TR_FPGA in real-time as DSP_FPGA controls the interface; Delay control in
transmitting; Receive the gain control of the clip, etc.
4.2.3 CW Module
CW is an option. The transmitting circuit of CW shares the transmitting circuit with B/Color mode.
The receiving circuit of CW is more than B/Color mode’s.
CW module of DC-70 V4.0 is CW mini board. It is used to add the receiving signals of TR board and
adjust the data. The data is transmitted to TR_FPGA inside TR board. TR_FPGA recognizes CW
mini board via in-place signal and ID code.
4.2.4 Engine Board
Engine board is equipped with pre-processing of beam data, scanning generator, primary clock on
front-end, ATGC circuit, probe management control, high-voltage switch control, etc. The board is
also considered as the engine of ultrasound service.
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