US PATENT SUBCLASS 327 / 530
.~ With specific source of supply or bias voltage

Current as of: June, 1999
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327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

524  DF  SPECIFIC IDENTIFIABLE DEVICE, CIRCUIT, OR SYSTEM {22}
530.~ With specific source of supply or bias voltage {9}
531  DF  .~.~> Fluctuating or AC source with rectifier or filter {2}
534  DF  .~.~> Having particular substrate biasing {1}
538  DF  .~.~> Stabilized (e.g., compensated, regulated, maintained, etc.) {4}
544  DF  .~.~> Power conservation or pulse type
545  DF  .~.~> Including signal protection or bias preservation {1}
547  DF  .~.~> With selectively or alternately DC or AC input
548  DF  .~.~> With oscillator or interrupter
549  DF  .~.~> With hum or interaction prevention
550  DF  .~.~> With particular filament heating circuit

DEFINITION

Classification: 327/530

With specific source of supply or bias voltage:

(under subclass 524) Subject matter wherein either (a) a DC bias potential other than signal voltage is applied or maintained between two or more electrodes in order to determine the operating point on the characteristic curve of a device or (b) electrical power or bias voltage is applied to a region of a nonlinear solid-state device or circuit.

(1) Note. The claimed subject matter does not comprise significant structure so as to limit the power supply to those provided for in a particular art area.

(2) Note. The systems found in this class may include means to supply current to the anode or filament, a potential to the grid of an electron tube (which is usually negative with respect to the cathode), or establishing or maintaining a direct current voltage between two elements of an electron tube.

(3) Note. Claimed subject matter having biasing on and off wherein a switched input is identical to the output will be classified in subclasses 365+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

365+, for switching input supply or bias to the output wherein the input signal is the same as the output signal.

531, for biasing systems in identifiable circuits, in general.

535+, for biasing or power supply circuitry with significant stabilizing circuitry for regulating the bias or power supply level. 597, for particular grid control systems.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

18+, 31+, and 43+ for plural power supplies, and subclass 150 for miscellaneous power packs, per se.

315, Electric Lamp and Discharge Devices, Systems,

1+, for cathode-ray tube power supply circuits, subclasses 86+ for power supply systems for space discharge devices, in general, with automatic substitution in the power supply, subclasses 137+ for polyphase AC supply circuits, subclasses 160+ for plural power supplies, subclasses 200+ for circuits having a discharge device and/or rectifier in the supply circuit, subclass 209 for circuits having a periodic switch in the supply circuit, subclasses 227+ for circuits with a condenser in the supply circuit, and subclasses 248+ for a pulsating or AC supply circuit.

323, Electricity: Power Supply or Regulation Systems,

311+, for circuits that supply a regulated voltage, current or power to a nonspecific or general load device.

330, Amplifiers,

113, for polyphase power supply systems, subclasses 114+ for unrectified AC power supply systems, subclasses 127+ for amplifier tube biasing systems subclasses 199+ for power or bias supplies, in general, and subclasses 296 and 297 having particular power supply or biasing for linear amplifier circuits or systems.

331, Oscillators, 185+, for particular sources of power or bias for oscillators.

363, Electric Power Conversion Systems, subclasses, particularly

13+, for rectifying or derectifying systems which may include electron tubes and their control.

378, X-Ray or Gamma Ray Systems or Devices,

91+, for X-ray device circuits.