Active load isolator and wireless speaker for mixed signal environments
AssigneeAudiovox Corporation
InventorJorgen Andersen
Life of this patent
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Abstract
An isolation circuit includes a low dropout operational current control loop and a shunt regulator. The current control loop is configured to drive the shunt regulator to result in a high dynamic impedance ratio between a voltage source and a load. The current control loop may include a series-pass transistor, a current sensing resistor, and a high side current sensor.
Claims20
An isolation circuit, comprising:
- a low dropout operational current control loop;
- and
- a shunt regulator,
- wherein the current control loop is configured to drive the shunt regulator to result in a high dynamic impedance ratio between a voltage source and a load.
A method of isolating a current switching device, the method comprising using a low dropout current control loop to drive a shunt regulator to result in a high dynamic impedance ratio between a voltage source and the current switching device.
A wireless speaker, comprising:
- an RF transceiver;
- a speaker amplifier;
- a speaker;
- and
- an isolation circuit to supply power to the RF transceiver to isolate current switching effects of the RF transceiver from the speaker and the speaker amplifier, the isolation circuit comprising:
- a low dropout operational current control loop;
- and
- a shunt regulator,
- wherein the current control loop is configured to drive the shunt regulator to result in a high dynamic impedance ratio between a voltage source and a load.
Dependencies are inferred from the claim text.