Tait TP9100 - Page 52

52 Circuit Descriptions TP9100 Service Manual
© Tait Electronics Limited May 2005
Figure 3.2 Block diagram of the transmitter circuitry
RF
Connector
Receiver
LPF
PA
Power Control
PIN
Switch
Driver Exciter
Shaper
and Level
Shifter
Crowbar
Shaping
Filter
TX RX RF
Transmitter
OR Gate
TX INH
+5V TX +7V5 LINK DIG TX INH SYN LOCK SYN TX LO
Power
Supply
Digital
Frequency
Synthesizer
CDC TXFIN RXAGC CDC TXPWR RXFE Thermal Coupling
Codec
and
Audio
Signal Types:
RF analog clock digital asynchronous serial data synchronous serial data
Interfaces
AGND
Shaper
and Level
Shifter
Buffer
Current
Sensing
PA
Difference
Amplifier
Pre-
Driver
+7V5 BATT