DC self-biased vacuum tube differential amplifier with grid-to-cathode over-voltage protection
OwnerChi Ming John Laminventor
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Abstract
A single stage differential amplifier is disclosed as comprising a pair of vacuum tube triodes for amplifying two input signals and generating two output signals. The differential amplifier has DC self-biasing ability and grid-to-cathode over-voltage protection for directly coupling from the outputs of another differential amplifier. By possessing these unique features, this differential amplifier becomes an important building block in forming a balanced amplifier by cascading multi differential amplifiers in a directly coupled fashion.
Claims14
A single stage differential amplifier including a pair of vacuum tube triodes for amplifying two input signals and generating two output signals, wherein said input signals are fed to the grids of said pair of vacuum tube triodes, and a pair of two series resistors on each grid is cross-connected to two separate junctions formed by a pair of two series resistors, respectively, such that the latter pair of series resistors are connected together with a constant current source connected to a negative power supply.
Dependencies are inferred from the claim text.