Receiver circuit
First Claim
1. A receiver circuit, comprising:
- an analog front-end circuit configured to resolve an output signal from an input signal as a function of a plurality of adjustable parameters, the plurality of adjustable parameters including a termination parameter, an emphasis parameter, a compensation parameter, an amplification parameter, and an equalization parameter;
a first adaptation circuit coupled to the analog front-end circuit and configured to determine a plurality of values of the plurality of adjustable parameters responsive to the output signal; and
a second adaptation circuit coupled to the analog front-end circuit and to the first adaptation circuit, the second adaptation circuit configured to store the plurality of values of the plurality of adjustable parameters in a register and to adjust the plurality of values of the plurality of adjustable parameters responsive to at least one operating condition of the receiver circuit,wherein the at least one operating condition includes a temperature or a power supply voltage of the receiver circuit.
1 Assignment
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Accused Products
Abstract
A receiver circuit includes an analog front-end circuit, a first adaptation circuit, and a second adaptation circuit. A method operates the receiver circuit. The analog front-end circuit is configured to resolve an output signal from an input signal as a function of adjustable parameters. The first adaptation circuit is coupled to the analog front-end circuit and is configured to determine values of the adjustable parameters responsive to the output signal. The second adaptation circuit is coupled to the analog front-end circuit and to the first adaptation circuit. The second adaptation circuit is configured to adjust the values of the adjustable parameters responsive to one or more operating conditions of the receiver circuit. These operating conditions include a temperature and/or a power supply voltage of the receiver circuit.
12 Citations
19 Claims
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1. A receiver circuit, comprising:
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an analog front-end circuit configured to resolve an output signal from an input signal as a function of a plurality of adjustable parameters, the plurality of adjustable parameters including a termination parameter, an emphasis parameter, a compensation parameter, an amplification parameter, and an equalization parameter; a first adaptation circuit coupled to the analog front-end circuit and configured to determine a plurality of values of the plurality of adjustable parameters responsive to the output signal; and a second adaptation circuit coupled to the analog front-end circuit and to the first adaptation circuit, the second adaptation circuit configured to store the plurality of values of the plurality of adjustable parameters in a register and to adjust the plurality of values of the plurality of adjustable parameters responsive to at least one operating condition of the receiver circuit, wherein the at least one operating condition includes a temperature or a power supply voltage of the receiver circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A receiver circuit, comprising:
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an analog front-end circuit configured to resolve an output signal from an input signal as a function of values of a plurality of adjustable parameters, the plurality of adjustable parameters including a termination parameter, an emphasis parameter, a compensation parameter, an amplification parameter, and an equalization parameter; wherein the analog front-end circuit includes an amplifier configured to provide a gain specified by an amplification parameter of the plurality of adjustable parameters; wherein the analog front-end circuit further includes a decision feedback equalizer configured to provide negative feedback specified by an equalization parameter of the plurality of adjustable parameters; a first adaptation circuit coupled to the analog front-end circuit and configured to determine a plurality of values for the plurality of adjustable parameters responsive to an eye opening of the output signal; a second adaptation circuit coupled to the analog front-end circuit and to the first adaptation circuit, the second adaptation circuit configured to store the plurality of values of the plurality of adjustable parameters in a register and to determine a plurality of offsets for the plurality of adjustable parameters responsive to a plurality of operating conditions including a temperature and a power supply voltage of the receiver circuit; and wherein the analog front-end circuit is configured to set the plurality of adjustable parameters to the plurality of values respectively adjusted with the plurality of offsets. - View Dependent Claims (10, 11)
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12. A method of operating an analog front-end circuit that resolves an output signal from an input signal based on values of a plurality of adjustable parameters, the method comprising:
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determining a first set of offset values of the plurality of adjustable parameters for each of a plurality of combinations operating conditions, each combination providing a characterization value for each of at least one the operating conditions, the plurality of adjustable parameters including a termination parameter, an emphasis parameter, a compensation parameter, an amplification parameter, and an equalization parameter; operating the analog front-end circuit in an ambient environment, including automatically selecting a second set of uncompensated values of the plurality of adjustable parameters as a function of an analysis of the output signal; storing the uncompensated values of the plurality of adjustable parameters in a register; measuring an ambient value for each of the at least one operating condition in the ambient environment; automatically selecting an adjustment including the first set of offset values for one of the plurality of combinations providing the characterization value for each operating condition that matches the ambient value for the operating condition; and adjusting the operating of the analog front-end circuit in the ambient environment, including adjusting the second set of uncompensated values with the first set of offset values from the adjustment. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification