Delay Line Driver

The Delay Line Driver converts the signal current from the Diode Gates into a signal voltage for application to the Delay Line. The Delay Line Driver is configured as a differential shunt feedback amplifier and is composed of Q331, Q335, Q341, and Q345. Input currents to common-

CH 2+ VERTICAL SIG

CH 1 + VERTICAL SIG

FROM CHANNEL SWITCHING LOGIC

CH 1 ENABLE

CH 2 ENABLE

CH 1 ~ VERTICAL SIG

CH 2-VERTICAL SIG

CR288 *

CR 188

CR287

CR277

CR 178

CR278 *

VERTICAL SIGNAL > TO DELAY LINE DRIVER

SIGNAL PATH

* REVERSE BIASED DIODE

ADD ENABLE

3826-25

Figure 3-3. Diode gate biasing for a Channel 1 display.

emitter transistors Q331 and Q341 are converted to voltages at the bases of Q335 and Q345 respectively. Emitter-follower output transistors Q335 and Q345 then drive the Delay Line through reverse terminations R335-C335 and R345-C345. Amplifier compensation is provided by R340 and C340, and shunt feedback is supplied by R336 and R345.

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