Current switch and method of driving the same
AssigneeAnalog Devices, Inc.
InventorAnthony Turvey
Life of this patent
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Abstract
A method and apparatus for driving a current switch with a differential drive signal monitors both the temperature of the switch and the current through the switch. The method and apparatus dynamically control the amplitude of the drive signal as a function of the switch temperature and the current through the switch. The result is a significant reduction in base drive amplitude without compromise to offset and linearity performance of the driver. The resulting dynamic performance of the switch is substantially improved.
Claims33
A method of driving a current switch, the switch being driven by a differential drive signal, the method comprising:
- monitoring the temperature of the switch;
- monitoring the current through the switch;
- and
- controlling the amplitude of the drive signal of the switch as a function of the switch temperature and the current through the switch.
A current switch driven by a differential drive signal, the switch comprising:
- a temperature monitor capable of monitoring the temperature of the switch;
- a current monitor capable of monitoring the current through the switch;
- and
- a signal controller operatively coupled with the temperature monitor and the current monitor, the signal controller controlling the amplitude of the drive signal of the switch as a function of the switch temperature and the current through the switch.
A method of driving a current switch, the switch being driven by a differential drive signal, the method comprising:
- monitoring the temperature of the switch;
- and
- controlling the amplitude of the drive signal of the switch as a function of the switch temperature.
A current switch driven by a differential drive signal, the switch comprising:
- a temperature monitor capable of monitoring the temperature of the switch;
- and
- a switch controller operatively coupled with the temperature monitor, the switch controller controlling the amplitude of the drive signal of the switch as a function of the switch temperature.
A method of driving a current switch, the switch being driven by a differential drive signal, the method comprising:
- monitoring the current through the switch;
- and
- non-linearly controlling the amplitude of the drive signal of the switch as a function of the current through the switch.
A current switch driven by a differential drive signal, the switch comprising:
- a current monitor capable of monitoring the current through the switch;
- and
- a switch controller operatively coupled with the current monitor, the switch controller non-linearly controlling the amplitude of the drive signal of the switch as a function of the current through the switch.
Dependencies are inferred from the claim text.