Ribbon microphone incorporating a special-purpose transformer and/or other transducer-output circuitry
OwnerDavid Royer, Richard Perrottainventors
Life of this patent
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Abstract
Provided is a ribbon-microphone circuit that includes a ribbon transducer and a specially designed transformer. In various possible configurations, the transformer: is a toroidal transformer, has multiple interleaved primary windings, has exactly four primary coils, is a tape-wound-core transformer, has a turns ratio of the composite secondary coil to the composite primary coil of at least 100:1, includes at least three interleaved secondary coils, includes at least three interleaved primary coils, and/or has multiple primary and secondary windings that are interleaved with each other. A buffer circuit also may be enclosed within the outer casing.
Claims25
A ribbon-microphone circuit, comprising:
- (a) a magnet structure forming an elongated central gap such that an overall magnetic north pole is provided on a first side of the elongated central gap and an overall magnetic south pole is provided on a second side of the elongated central gap;
- (b) a thin strip of electrically conductive material, referred to as a ribbon, suspended within the elongated central gap;
- (c) an electrical contact at each end of the ribbon for outputting a signal generated by the ribbon;
- and
- (d) a step-up toroidal transformer, having plural primary coils electrically coupled to the electrical contacts of the ribbon and having at least one secondary coil.
A ribbon-microphone circuit, comprising:
- (a) a magnet structure forming an elongated central gap such that an overall magnetic north pole is provided on a first side of the elongated central gap and an overall magnetic south pole is provided on a second side of the elongated central gap;
- (b) a thin strip of electrically conductive material, referred to as a ribbon, suspended within the elongated central gap;
- (c) an electrical contact at each end of the ribbon for outputting a signal generated by the ribbon;
- and
- (d) a step-up transformer, having plural interleaved primary coils electrically coupled to the electrical contacts of the ribbon and having at least one secondary coil.
Dependencies are inferred from the claim text.