Reference voltage generator for hysteresis circuit
First Claim
1. A hysteresis circuit, comprising:
- a sensing amplifier to generate an output signal having an output and two inputs with one of the inputs coupled to an input signal;
a reference generator coupled to the output and the other one of the inputs of the sensing amplifier and responsive to the output signal to generate an output reference voltage;
the reference generator including a first originator circuit to generate a first reference voltage on a first reference voltage node;
a second originator circuit to generate a second reference voltage on a second reference voltage node;
a selector circuit coupled to the first and second originator circuits to provide as the output reference voltage either the first or second reference voltage based upon the output signal undertaking a falling signal transition or a rising signal transition respectively;
a voltage supply; and
a ground;
the first originator circuit including a first p-channel device and a second p-channel device coupled in parallel between the voltage supply and the first reference voltage node; and
the second originator circuit including a first n-channel device and a second n-channel device coupled in parallel between the second reference voltage node and the ground.
1 Assignment
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Accused Products
Abstract
A voltage reference generator for a hysteresis circuit, comprising a first originator circuit to generate a first reference voltage; a second originator circuit to generate a second reference voltage; and a selector circuit, coupled to the first and second originator circuits, to select one of the first and second reference voltages to be an output reference voltage based upon an input signal to the hysteresis circuit undertaking a low-to-high or a high-to-low signal transition respectively. The first originator circuit includes a first plurality of channel devices selected from either p-channel devices or n-channel devices and the second originator circuit includes a second plurality of channel devices selected from the other one of the p-channel devices and the n-channel devices.
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Citations
20 Claims
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1. A hysteresis circuit, comprising:
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a sensing amplifier to generate an output signal having an output and two inputs with one of the inputs coupled to an input signal;
a reference generator coupled to the output and the other one of the inputs of the sensing amplifier and responsive to the output signal to generate an output reference voltage;
the reference generator including a first originator circuit to generate a first reference voltage on a first reference voltage node;
a second originator circuit to generate a second reference voltage on a second reference voltage node;
a selector circuit coupled to the first and second originator circuits to provide as the output reference voltage either the first or second reference voltage based upon the output signal undertaking a falling signal transition or a rising signal transition respectively;
a voltage supply; and
a ground;
the first originator circuit including a first p-channel device and a second p-channel device coupled in parallel between the voltage supply and the first reference voltage node; and
the second originator circuit including a first n-channel device and a second n-channel device coupled in parallel between the second reference voltage node and the ground. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system, comprising:
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an integrated circuit having a reference generator to generate an output reference voltage;
a hysteresis circuit responsive to an input signal and the output reference voltage to generate an output signal;
the reference generator including a first originator circuit to generate a first reference voltage on a first reference voltage node;
a second originator circuit to generate a second reference voltage on a second reference voltage node;
a selector circuit coupled to the first and second originator circuits to provide as the output reference voltage either the first or second reference voltage based upon the output signal undertaking a falling signal transition or a rising signal transition respectively;
a voltage supply; and
a ground;
the first originator circuit including a first p-channel device and a second p-channel device coupled in parallel between the voltage supply and the first reference voltage node; and
the second originator circuit including a first n-channel device and a second n-channel device coupled in parallel between the second reference voltage node and the ground;
a DRAM coupled to the integrated circuit; and
an input/output interface coupled to the integrated circuit. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification