Product Principle 4-7
4.2.5 4D-TEE Board
FPGA
Drive
Filter
wave
Comp
DA
AD
Unit
Load
Digital
Simulation part
Current
monitoring
unit
overcurrent
Current monitoring
Overcurrent
TEE
AD
unit
ADC SPI
DAC SPI
4D Drive Board
Engine board
DSP
FPGA
Figure 7 Principle Diagram of 4D-TEE board
Function:
 Provides two channels H-bridge power amplified signal
 The gain of power amplified circuit can be adjusted.
 Provides the detection for the hot resistance in TEE probe.
 Provides the adjustment and switch for TEE probe's temperature signal.
 Provides self- diagnosis channel of 4D drive circuit.
 Overcurrent, overvoltage and over-temperature protection.
4.3 Ultrasound Back-end Unit
The back-end unit supports the platform of whole ultrasound system. It takes charge of back-end’s
central control. It also offers the calculation capacity for image post-processing, user information
storage, the display, etc. the modules include:
 COME (CPU) Module
 Independent GPU (GPU)
 Memory device (SSD&SATA hard disk)
 PC carrier board
 User I/O Interface Board
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