He designed and built about 15 electronic instruments, including a counting-rate meter with industrial applications, a closed-circuit television system used at the cyclotron, a charge-sensitive low-noise amplifier and a precision pulse generator for a semiconductor detector spectrometer and a switching circuit for photomultiplier tubes.
42.
Thyristors may be used in power-switching circuits, relay-replacement circuits, inverter circuits, oscillator circuits, level-detector circuits, chopper circuits, light-dimming circuits, low-cost timer circuits, logic circuits, speed-control circuits, phase-control circuits, etc . Originally, thyristors relied only on current reversal to turn them off, making them difficult to apply for direct current; newer device types can be turned on and off through the control gate signal.
