Self-bias emitter circuit
First Claim
1. An emitter circuit for providing a direct current (DC) bias voltage, comprising:
- an emitter;
a transductor that includes a primary winding and a secondary winding, wherein the secondary winding is operable to receive an alternating current (AC) carrier signal;
a first voltage multiplier and rectifier operable to generate a positive DC bias voltage from the AC carrier signal;
a second voltage multiplier and rectifier operable to generate a negative DC bias voltage from the AC carrier signal, wherein the second voltage multiplier and rectifier is symmetrical to the first voltage multiplier and rectifier;
one or more zener diodes operable to limit an amplitude of a DC bias voltage applied across the emitter, wherein the DC bias voltage is based on the positive DC bias voltage and the negative DC bias voltage; and
a filter capacitor, in parallel with the one or more zener diodes, operable to smooth the DC bias voltage that is applied across the emitter.
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Accused Products
Abstract
A emitter circuit for providing a bias voltage is disclosed. The emitter circuit can comprise an emitter. The emitter circuit can comprise a transductor that includes a primary winding and a secondary winding. The secondary winding can be operable to receive an alternating current (AC) carrier signal. The emitter circuit can comprise a voltage multiplier operable to receive the AC carrier signal from the secondary winding and generate a DC bias voltage. The emitter circuit can comprise a zener diode to limit an amplitude of the DC bias voltage applied across the emitter. The emitter circuit can comprise a filter capacitor operable to smooth the DC bias voltage applied across the emitter.
192 Citations
19 Claims
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1. An emitter circuit for providing a direct current (DC) bias voltage, comprising:
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an emitter; a transductor that includes a primary winding and a secondary winding, wherein the secondary winding is operable to receive an alternating current (AC) carrier signal; a first voltage multiplier and rectifier operable to generate a positive DC bias voltage from the AC carrier signal; a second voltage multiplier and rectifier operable to generate a negative DC bias voltage from the AC carrier signal, wherein the second voltage multiplier and rectifier is symmetrical to the first voltage multiplier and rectifier; one or more zener diodes operable to limit an amplitude of a DC bias voltage applied across the emitter, wherein the DC bias voltage is based on the positive DC bias voltage and the negative DC bias voltage; and a filter capacitor, in parallel with the one or more zener diodes, operable to smooth the DC bias voltage that is applied across the emitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An emitter circuit in a parametric loudspeaker for providing a bias voltage, the emitter circuit comprising:
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an emitter configured to emit ultrasonic signals; a transductor that includes a primary winding and a secondary winding, wherein the secondary winding is operable to receive an alternating current (AC) carrier signal; a voltage multiplier and rectifier operable to generate a DC bias voltage from the AC carrier signal; a zener diode operable to limit an amplitude of the DC bias voltage that is applied across the emitter; and a filter capacitor, in parallel with the zener diode, operable to smooth the DC bias voltage applied across the emitter. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An emitter circuit in a parametric speaker for providing a bias voltage, the emitter circuit comprising:
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an emitter configured to emit ultrasonic signals; a transductor that includes a primary winding and a secondary winding, wherein the secondary winding is operable to receive an alternating current (AC) carrier signal; a voltage multiplier operable to receive the AC carrier signal from the secondary winding and generate a DC bias voltage; a zener diode to limit an amplitude of the DC bias voltage applied that is across the emitter; and a filter capacitor operable to smooth the DC bias voltage applied across the emitter. - View Dependent Claims (17, 18, 19)
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Specification