Tait TP9100 - Page 67

TP9100 Service Manual Circuit Descriptions 67
© Tait Electronics Limited May 2005
Figure 3.6 Block diagram of the power supply circuitry
Power
Supply
Trans-
mitter
Frequency
Synthesizer
CODEC
and
Audio
Receiver
Digital
Debug
Connectors
Interfaces
3V3
SMPS
3V
Regulator
5V
Regulator
+3V3
1V8
Regulator
3 V RX
Switch
PSU
Supervisor
+7V5 LINK
+5V AN
+3V3
+3V0 AN
+3V0 AN
+3V3
+1V8
+3V0 AN
+3V0 RX
DIG RX EN
DIG 5V TX EN
DIG 5V AN EN
+3V3
DIG WD KICK
PSU SYS RST
+3V3
AGND
+7V5 LINK
+7V5 BATT
1V5
SMPS
Signal Types:
analog
clock
digital
asynchronous
serial data
synchronous
serial data
+3V3
+7V5 SW
DIG PSU LATCH
2V5
Regulator
5V
Regulator
5V
Regulator
5V
Regulator
+5V TX
+7V5 LINK
+2V5 CDC
+5V TX
+7V5 SW
DIG 3V0 AN EN
+1V5
+1V8
+7V5 BATT
+7V5 LINK
+3V0 AN
+2V5 SYN
Power-up
Circuitry