Coupled inverter with auto-calibration
First Claim
1. A device, comprising:
- an input configured to receive an input signal in an operational mode and to receive a reference voltage in a calibration mode;
a capacitor configured to store a reference charge based on the reference voltage;
an input inverter configured to capture a transition of the input signal, the input inverter coupled in series with the capacitor so that the transition of the input signal occurs when a voltage of the input signal crosses the reference voltage; and
an output inverter, coupled in series with the input inverter, and configured to provide an output signal having a parity of the input signal.
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Accused Products
Abstract
A device including an input configured to receive an input signal in an operational mode and to receive a reference voltage in a calibration mode is provided. The device includes a capacitor to store a reference charge based on the reference voltage and an input inverter to capture a transition of the input signal. The input inverter is coupled in series with the capacitor so that the transition of the input signal occurs when a voltage of the input signal crosses the reference voltage. The device includes an output inverter coupled in series with the input inverter to provide an output signal having a parity of the input signal. A system including the above device, and a method for calibrating the above device, are also provided.
9 Citations
20 Claims
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1. A device, comprising:
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an input configured to receive an input signal in an operational mode and to receive a reference voltage in a calibration mode; a capacitor configured to store a reference charge based on the reference voltage; an input inverter configured to capture a transition of the input signal, the input inverter coupled in series with the capacitor so that the transition of the input signal occurs when a voltage of the input signal crosses the reference voltage; and an output inverter, coupled in series with the input inverter, and configured to provide an output signal having a parity of the input signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system, comprising:
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a first receiver channel comprising; a first input configured to receive an input signal in a first operational mode and to receive a reference voltage in a first calibration mode; an input inverter configured to capture a transition of the input signal when a voltage of the input signal crosses the reference voltage; a second receiver channel configured to; receive the input signal in a second operational mode, and receive the reference voltage in a second calibration mode; and a multiplexer configured to provide an output signal based on the input signal in a continuous overlap of the first operational mode and the second operational mode. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method, comprising:
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coupling an output of an inverting gate to an input of the inverting gate in a calibration mode of a receiver; charging a capacitor disposed between a reference voltage and the input of the inverting gate when the input and the output of the inverting gate reach an equilibrium in the calibration mode; coupling an input of the inverting gate to an input signal through the capacitor; and interleaving an operational mode of the receiver with the calibration mode in a duty cycle. - View Dependent Claims (18, 19, 20)
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Specification