Slew control using a switched capacitor circuit
First Claim
1. An apparatus comprising:
- a swing control circuit configured and arranged to be powered by an input supply voltage, to receive an input data signal and, in response, to generate a first internal signal having a swing level corresponding to the input supply voltage;
a slew control circuit, including a switched capacitor circuit, configured and arranged to receive the first internal signal and, in response, to generate a second internal signal using the switched capacitor circuit to set a slew rate for the second internal signal; and
a driver circuit configured and arranged to receive the second internal signal and, in response, to generate an output signal that is based upon the swing level and the slew rate of the second internal signal.
1 Assignment
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Accused Products
Abstract
An apparatus includes a swing control circuit, a slew control circuit, and a driver circuit. The swing control circuit is configured and arranged to be powered by an input supply voltage, to receive an input data signal and, in response, to generate a first internal signal having a swing level corresponding to the input supply voltage. The slew control circuit, including a switched capacitor circuit, is configured and arranged to receive the first internal signal and, in response, to generate a second internal signal using the switched capacitor circuit that is configured to set a slew rate for the second internal signal. Further, the driver circuit is configured and arranged to receive the second internal signal and, in response, to generate an output signal that is based upon the swing level and the slew rate of the second internal signal.
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Citations
20 Claims
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1. An apparatus comprising:
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a swing control circuit configured and arranged to be powered by an input supply voltage, to receive an input data signal and, in response, to generate a first internal signal having a swing level corresponding to the input supply voltage; a slew control circuit, including a switched capacitor circuit, configured and arranged to receive the first internal signal and, in response, to generate a second internal signal using the switched capacitor circuit to set a slew rate for the second internal signal; and a driver circuit configured and arranged to receive the second internal signal and, in response, to generate an output signal that is based upon the swing level and the slew rate of the second internal signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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generating, responsive to a swing control circuit receiving an input data signal, a first internal signal having a swing level corresponding to an input supply voltage, wherein the swing control circuit is powered using the input supply voltage; generating, responsive to a slew control circuit receiving the first internal signal, a second internal signal using a switched capacitor circuit to set a slew rate for the second internal signal, wherein the slew control circuit includes the switched capacitor circuit; and generating, responsive to a driver circuit receiving the second internal signal, an output signal that is based upon the swing level and the slew rate of the second internal signal. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An apparatus comprising:
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a slew control circuit configured and arranged to receive a first internal signal having a swing level corresponding to an input supply voltage and, in response, to generate a second internal signal, the slew control circuit including; a switched capacitor circuit comprised of a first capacitor and two switches, the switched capacitor circuit configured and arranged to emulate a resistive portion of a resistor capacitor (RC) circuit that sets a slew rate of the second internal signal; and a second capacitor; and a driver circuit configured and arranged to receive the second internal signal and, in response, to generate an output signal that is based upon the swing level and the slew rate of the second internal signal. - View Dependent Claims (18, 19, 20)
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Specification