Low power high speed receiver with reduced decision feedback equalizer samplers
First Claim
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1. An apparatus comprising:
- an analog to digital converter (ADC) to operate as a Variable Gain Amplifier (VGA) and as a set of samplers to sample data output from the ADC according to a clock signal, wherein the ADC is to operate as a VGA when threshold levels to the ADC are adjusted,wherein the set of samples have programmable threshold, and wherein the set of samplers comprise clocked comparators; and
a Clock Data Recovery (CDR) circuit coupled to the ADC, wherein the CDR comprises a phase detector which is to instruct an oscillator to adjust a phase of the clock signal such that magnitude of a first post-cursor signal associated with the sampled data is substantially half of a magnitude of a primary cursor tap associated with the sampled data, wherein the clock signal with adjusted phase is provided to the ADC.
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Abstract
Described is an apparatus which comprises: a Variable Gain Amplifier (VGA); a set of samplers to sample data output from the VGA according to a clock signal; and a Clock Data Recovery (CDR) circuit to adjust phase of the clock signal such that magnitude of a first post-cursor signal associated with the sampled data is substantially half of a magnitude of a primary cursor tap associated with the sampled data.
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Citations
24 Claims
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1. An apparatus comprising:
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an analog to digital converter (ADC) to operate as a Variable Gain Amplifier (VGA) and as a set of samplers to sample data output from the ADC according to a clock signal, wherein the ADC is to operate as a VGA when threshold levels to the ADC are adjusted, wherein the set of samples have programmable threshold, and wherein the set of samplers comprise clocked comparators; and a Clock Data Recovery (CDR) circuit coupled to the ADC, wherein the CDR comprises a phase detector which is to instruct an oscillator to adjust a phase of the clock signal such that magnitude of a first post-cursor signal associated with the sampled data is substantially half of a magnitude of a primary cursor tap associated with the sampled data, wherein the clock signal with adjusted phase is provided to the ADC. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 17, 18, 19)
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13. A system comprising:
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a memory; a processor coupled to the memory, the processor having a receiver which comprises; an analog to digital converter (ADC) to operate as a Variable Gain Amplifier (VGA) and as a set of samplers to sample data output from the ADC according to a clock signal, wherein the ADC is to operate as a VGA when threshold levels to the ADC are adjusted wherein the set of samples have programmable threshold, and wherein the set of samplers comprise clocked comparators; and a Clock Data Recovery (CDR) circuit coupled to the ADC, wherein the CDR comprises a phase detector which is to instruct an oscillator to adjust a phase of the clock signal such that magnitude of a first post-cursor signal associated with the sampled data is substantially half of a magnitude of a primary cursor tap associated with the sampled data, wherein the clock signal with adjusted phase is provided to the ADC; and a wireless interface to allow the processor to communicate with another device. - View Dependent Claims (14, 15, 16)
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20. An apparatus comprising:
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an analog-to-digital converter (ADC) to sample data output according to a clock signal, wherein the set of samples have programmable threshold; and a Clock Data Recovery (CDR) circuit coupled to the ADC, wherein the CDR is to adjust a phase of a clock signal such that magnitude of a first post-cursor signal associated with the sampled data is substantially half of a magnitude of a primary cursor tap associated with the sampled data, wherein the clock signal with adjusted phase is provided to the ADC. - View Dependent Claims (21, 22, 23, 24)
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Specification