Amplifies DAC voltages to the high levels needed to move the electron beam.
An electrostatic CRT cannot function without an array of stable, high voltages. A typical 3-inch CRT requires: Crt Clock Schematic
If the electron beam is always on, the CRT will display messy "retrace lines" as the beam moves from the end of one digit to the start of the next. The Z-axis circuit acts as a high-speed switch connected to Grid 1 (G1) of the CRT. Amplifies DAC voltages to the high levels needed
The CRT requires high voltages to accelerate the electron beam. The HV supply is the most critical subsystem. It must generate the (often 300-400V for smaller tubes, but up to 30kV for others). This is typically achieved using a flyback transformer (common in televisions) or a voltage multiplier circuit. A straightforward approach uses a 12V to 300V DC-DC step-up converter module to generate the necessary plate voltage for smaller tubes. This is a much simpler method than building a tube-based high-voltage supply from scratch. The Z-axis circuit acts as a high-speed switch