Tait TM8110 Service Manual

78 Circuit Descriptions TM8100/TM8200 Service Manual
© Tait Electronics Limited June 2006
Figure 3.7 Block diagram of the CODEC and audio circuitry
DAC
CODEC 1
CODEC 2
Level
Shifter
2V3
Supply
Voltage
Divider
Buffer
Amplifier
Summer
Audio PA
Bias
Network
LPF
Buffer
Amplifier
CODEC and Audio
CDC RX VREF RX CDC IP RX CDC IN RX CDC QP RX CDC QN DIG RX EN CDC RX AGC CDC RX FE TUNE CDC TX FIN BIAS1 CDC TX FIN BIAS2 CDC TX DRV BIAS CDC TX PWR CTL TX TEMP TX FWD PWR TX REV PWR SYN CDC LFV CDC VCO MOD CDC VCXO MOD SYN CDC FCL
Digital Board
AGND
+13V8 BATT +2V5 CDC +9V0 +3V3 +3V0 AN CDC RX AUD AUD ITF SPK+ AUD ITF SPK– ITF RX BEEP IN ITF CH MIC AUD ITF AUX MIC AUD ITF VOL WIP DC CDC AUD TAP OUT CDC RSSI ITF AUD TAP IN
CDC2 DIG SDTO
DIG RX EN
DIG CDC2 SDTI
DIG CDC2 SCLK
DIG CDC2 LRCK
DIG SYS CLK
DIG DAC LATCH
DIG DAC SPI DO
DIG DAC SPI CLK
+1V8
DIG CDC ARSM
CDC DIG VSFS
CDC DIG VSDO
DIG CDC VSDI
CDC DIG BSDO
CDC DIG BSOFS
DIG CDC ASFS
DIG CDC ASDI
CDC DIG ASDO
PSU SYS RST
PSU SYS RST
DIG RX EN
+2V3 FIL
Interface
Power
Supply
Receiver
Trans-
mitter
Frequency
Synthesizer
Volume
Control
DIG AUD CS
DIG AUD UD
DIG AUD PA EN1
DIG AUD PA EN2
Signal Types:
RF analog clock
digital asynchronous serial data synchronous serial data
CDC RX PIN AGC

Tait TM8110 Specifications

General

Brand	Tait
Model	TM8110
Category	Radio
Language	English