AdvancedA-002-005-009
Which of the following devices has anode, cathode, and gate?
A
Answer
Circuit design and power supplies
Type
A
The silicon controlled rectifier (SCR)
B
The field effect transistor
C
The triode vacuum tube
D
The bipolar transistor
Answer Notes
A Silicon Controlled Rectifier (SCR) is a four-layer solid-state current-controlling device. Its three terminals are the anode, cathode, and gate. The gate is used to trigger the device into conduction.
Contrast this with a field-effect transistor (FET), which has a source, drain, and gate, but no anode or cathode. A bipolar junction transistor (BJT) features a base, emitter, and collector. Meanwhile, a triode vacuum tube has a plate (anode), cathode, and control grid, not a gate.
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In amateur radio equipment, which is the major application for the silicon controlled rectifier (SCR)?
Next · A-002-005-010
When it is gated "on", the silicon controlled rectifier (SCR) exhibits electrical characteristics similar to a: