Invention Grant
- Patent Title: Delay compensation for sigma delta modulator
- Patent Title (中): Σ-Δ调制器的延迟补偿
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Application No.: US13598412Application Date: 2012-08-29
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Publication No.: US08638251B1Publication Date: 2014-01-28
- Inventor: Merit Hong , James Riches
- Applicant: Merit Hong , James Riches
- Applicant Address: US CA Santa Clara
- Assignee: McAfee, Inc.
- Current Assignee: McAfee, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Baker Botts LLP.
- Main IPC: H03M3/00
- IPC: H03M3/00

Abstract:
A continuous time delta-sigma modulator is provided that includes an integrator stage including a plurality of integrators; a quantizer to receive an input signal from the integrator stage and output a quantizer signal; a global feedback path providing feedback from the quantizer to the integrator stage; a local feedback path connecting the quantizer and a preceding integrator of the integrator stage configured to compensate for delay attributed to the global feedback path; and a delay compensation circuit. The delay compensation circuit is configured to calculate a delay value based on sources of additional delay within a local feedback loop, and to supply the additional delay value to the quantizer to compensate for delay within the local feedback loop.
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