Figure 2-20. +6.3 V regulator 1PS1A1, Schematic Diagram
Resistor R4 is connected in series from gate to gate so
d. Gate Assemblies (fig. 2-21). Five gate
that equal voltage drop per gate Is provided from the
assemblies (A2, A3, A4, A5, A6) are used between the
bridge rectifier to the 1000 V regulator (A2R4 is
high voltage bridge rectifier (on A7) and the 1000 V
connected to A7E4 and A6R4 is connected to A9E1 I1,
regulator A9. Each gate consists of a series pass
the return line of the 1000 V regulator). Normally this
voltage drop is about 60 V per gate but during breakdown
Maximum gate voltage (360 V) is set by Zener diodes
(short on 1000 V line) the voltage drop may be as high as
CR4 and CR5. Diodes CR1 and CR2 and capacitor C1
300 V per gate. This is why five gates are used.
provide the bias voltage (about 10 V) for the gate.