31/01/96
Copyright TEL
2.8
Power Supply And Regulator
Figure 2.4 T835 Power Supply And Regulator Block Diagram
The T835 is designed to operate off a 10.8-16V DC supply (13.8V nominal). A 5.3V regu-
lator (IC202) runs directly off the 13.8V rail, driving much of the synthesiser circuitry.
This is used as the reference for a DC amplifier (IC201, Q200 & Q201) which provides a
medium current capability 9V supply. A switching power supply, based on Q202 and
Q203, runs off the 9V supply and provides a low current capa20V supply. This is
used to drive the synthesiser loop filter (IC4), giving a VCO control voltage of up to 20V.
The 13.8V supply drives both output audio amplifiers without additional regulation.
5V
Reg
PS
13.8V
Nom.
5V
9V
20V
Switching
Power Supply
13.8V Nom.
From Rear
D-Range
Summary of Contents for T830 Series
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