Dynamic on chip slew rate control for MOS integrated drivers
First Claim
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1. A slew rate control system for a circuit, comprising:
- a temperature sensitive device adapted to generate a temperature signal;
a temperature dependent current source adapted to generate a first current source signal;
a temperature independent current source adapted to generate a second current source signal; and
a slew rate controller adapted to activate in response to said temperature signal when said temperature exceeds a first threshold, said slew rate controller further adapted to generate a slew rate control signal by adjusting a slew rate as a function of said temperature signal, said slew rate controller further adapted to activate said temperature dependent current source in response to said slew rate control signal.
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Abstract
A slew rate control system for a circuit includes a temperature sensitive device generates a temperature signal. A temperature dependent current source generates a first current source signal. A slew rate controller activates in response to the temperature signal when the temperature exceeds a first threshold. The slew rate controller then generates a slew rate control signal by adjusting slew rate as a function of the temperature signal. The slew rate controller then activates the temperature dependent current source in response to the slew rate control signal.
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18 Claims
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1. A slew rate control system for a circuit, comprising:
- a temperature sensitive device adapted to generate a temperature signal;
a temperature dependent current source adapted to generate a first current source signal;
a temperature independent current source adapted to generate a second current source signal; and
a slew rate controller adapted to activate in response to said temperature signal when said temperature exceeds a first threshold, said slew rate controller further adapted to generate a slew rate control signal by adjusting a slew rate as a function of said temperature signal, said slew rate controller further adapted to activate said temperature dependent current source in response to said slew rate control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a temperature sensitive device adapted to generate a temperature signal;
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12. A system for reducing power dissipation in a circuit adapted to supply an output voltage to an inductive load, comprising:
- a temperature sensitive device adapted to generate a temperature signal;
a temperature dependent current source adapted to generate a first current source signal;
a slew rate controller adapted to activate in response to said temperature signal when said temperature exceeds a threshold, said slew rate controller further adapted to generate a slew rate control signal by adjusting a slew rate as a function of said temperature signal, said slew rate controller further adapted to activate said temperature dependent current source in response to said slew rate control signal;
a temperature independent current source adapted to generate a second current source signal;
an adder adapted to sum said first current source signal and said second current source signal and thereby generate an adder signal;
a push-pull amplifier adapted to amplify current of said adder signal and thereby generate a load signal; and
a power transistor adapted to receive said load signal and transfer said load signal to an inductive load. - View Dependent Claims (13, 14, 15, 16, 17, 18)
- a temperature sensitive device adapted to generate a temperature signal;
Specification