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CY3273 Cypress Low Voltage Powerline Communication Evaluation Kit Guide, Doc. # 001-55382 Rev. *C
PLC LV Evaluation Board
3.3.2
Transmit Amplifier Circuit
This section takes the output signal from the transceiver chip. The circuit here amplifies the signal
for transmission over the powerline.
The key components in this section are listed in the following table.
Table 3-2. Transmit Amplifier
The key components are circled in the following schematic.
Figure 3-3. Transmit Amplifier Schematic
Component
Description
U1, Q3, Q2
This opamp and high gain transistors are used in the power amplification stage.
Q1
This transistor controls whether transmission is allowed based on the output of the
TXDISABLE pin
