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US 7,002,997 B2Granted
Interpolation filter structure
AssigneeWinbond Electronics Corp.
InventorsYu-Cheng Lin, Jyh-Huei Guo
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Abstract
An interpolation filter having a first gain multiplexer, a second gain multiplexer, an adder and a multiplexer. The interpolation filter uses neighboring input discrete-time signals to generate interpolation signals having the desired sampling rate.
Claims5
An interpolation filter structure, comprising:
- a first gain multiplexer for receiving a control signal, a previous discrete-time signal and a current discrete-time signal and selecting either the previous discrete-time signal or the current discrete-time signal according to the control signal to multiply by a first gain value and produce a first gain signal;
- a second gain multiplexer for receiving the control signal, the previous discrete-time signal and the current discrete-time signal and selecting either the previous discrete-time signal or the current discrete-time signal according to the control signal to multiply by a second gain value and produce a second gain signal;
- an adder for adding together the first gain signal and the second gain signal to produce an add signal;
- and
- a multiplexer for receiving the control signal, the previous discrete-time signal and the add signal and selecting either the previous discrete-time signal or the add signal to serve as a discrete-time interpolation signal.
2 more elements
Dependencies are inferred from the claim text.