Chapter 5. Product Structure 5 - 11
▐ Operational Principles
High Voltage Switching Process
HS70A는 supports 128 Channels, and uses up to 192-Element Probes. Since the
Beamformer’s Pulser and Receiver circuit structure has only 128 Channels, additional
Element Selection is required. Element Selection uses 24 High Voltage Switches, and
performs switching with the control signal sent from the Main Board’s Control Logic (CPLD).
Control Signal is connected via Mother Board Connectorfmf.
The inner structure of the High Voltage Switch consists of Shift Register and High Voltage
FET.
High Voltage Switching Process
It consists of circuits to choose one of four probes. It can use the relay of the latched type
to select a probe chosen by user.
The relay is operated by the probe select signal transmitted from the control logic (CPLD)
of CW (Continuous Wave Board). Probe Select signal is connected through the Mother
Board Connector. Probe Select signals are connected via the Mother Board Connector.
CW Probe Switching
Steered CW Switching: Steered CW has, separate from the Beam former Board, Tx
29CH and Rx 29CH and, by using Not latch Relay, it converts the signal line from Phased
Array Probe to the CW Board at Steered CW Mode. Because it has 29CH, there are 15
AGN20012s for CW Tx and there are 15 AGN20012 for CW Rx.
Static CW Switching:Static CW has Tx 1CH and Rx 1CH separately from the Beam
Former Board. Signal lines from Pencil Probe in the Stactic CW Mode will be directly
connected to the CW Board without Relay.
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