Cathode bias

In electronics cathode bias, also called self-bias, is a circuit used with amplifying vacuum tubes (valves) such as triodes, tetrodes and pentodes to provide a steady negative DC bias voltage on the control grid electrode of the tube, to set the operating point. It consists of a resistor connected between the tube's cathode and ground, in parallel with a bypass capacitor. Used with indirectly-heated tubes, it is one of the most widely used biasing circuits in vacuum tube electronic equipment.

单词	Cathode bias
释义	Cathode bias 英语百科 Cathode bias In electronics cathode bias, also called self-bias, is a circuit used with amplifying vacuum tubes (valves) such as triodes, tetrodes and pentodes to provide a steady negative DC bias voltage on the control grid electrode of the tube, to set the operating point. It consists of a resistor connected between the tube's cathode and ground, in parallel with a bypass capacitor. Used with indirectly-heated tubes, it is one of the most widely used biasing circuits in vacuum tube electronic equipment.
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