US PATENT SUBCLASS 327 / 545
.~.~ Including signal protection or bias preservation

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  DF  .~ With specific source of supply or bias voltage {9}
545.~.~ Including signal protection or bias preservation {1}
546  DF  .~.~.~> With field-effect transistor

DEFINITION

Classification: 327/545

Including signal protection or bias preservation:

(under subclass 530) Subject matter wherein a circuit is provided which guards against signal information loss or bias loss.

SEE OR SEARCH THIS CLASS, SUBCLASS:

379+, for gating circuitry with means to maintain signal transmission.

392+, for time delay circuits to control switching operations.

SEE OR SEARCH CLASS

324, Electricity: Measuring and Testing,

51+, for circuit fault detection and testing, per se.

326, Electronic Digital Logic Circuitry, 21+, for digital logic circuits or systems for improving reception sensitivity and maintaining transmission integrity.

340, Communications: Electrical,

636, for battery level condition responsive systems.

365, Static Information Storage and Retrieval,

228, for memory systems with provision for prevention of data loss (e.g., backup storage or power).

368, Horology: Time Measuring Systems or Devices,

66, for power source monitoring of chronological timepieces.

714, Error Detection/Correction and Fault Detection/Recovery, appropriate subclasses for subject matter limited to particular loss of data by transmission apparatus or to the recovery of information from error or Fault operating conditions (e.g., pulse coded data).