Rotating coefficient filter
US-8937506-B2 · Jan 20, 2015 · US
Buffer-less rotating coefficient filter
US9323959B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9323959-B2 |
| Application number | US-201313848272-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 21, 2013 |
| Priority date | Mar 21, 2012 |
| Publication date | Apr 26, 2016 |
| Grant date | Apr 26, 2016 |
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Abstract
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A circuit that provides a rotating coefficient FIR filter with all necessary coefficient sets present at the same time, without the need for delay elements, devices providing for adjustable impedances, or buffers is described. An input signal is sampled in a round robin fashion by a plurality of switches and capacitors. The capacitors are connected directly to sets of impedance devices. Each set of impedance devices implements the coefficients of the desired frequency response of the filter, adjusted to compensate for the decay of samples in the capacitors between samples. The impedance devices in each set are connected to the capacitors in a different order from each other set, so that each set of impedance devices will produce the desired frequency response when a different one of the capacitor contains a new sample of the input signal. Switches connect the sets of impedance devices to an output and a virtual ground, only one switch being connected to the output at a time to provide the output signal.
First claim
Opening claim text (preview).
What is claimed is: 1. A circuit comprising: an input configured to receive an input signal; a plurality of sampling circuits arranged in parallel for sampling the input signal in response to a timing signal, each sampling circuit consisting of a capacitor and a switch that connects the capacitor to the input signal, the sampling circuits configured such that successive sampling circuits create samples of the input signal in time-delayed succession at pre-determined intervals;…
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Physics · mapped topic
Physics · mapped topic
- G06G7/02Primary
Physics · mapped topic
- H03H15/023Primary
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9323959B2 cover?
- A circuit that provides a rotating coefficient FIR filter with all necessary coefficient sets present at the same time, without the need for delay elements, devices providing for adjustable impedances, or buffers is described. An input signal is sampled in a round robin fashion by a plurality of switches and capacitors. The capacitors are connected directly to sets of impedance devices. Each se…
- Who is the assignee on this patent?
- Ess Technology Inc
- What technology area does this patent fall under?
- Primary CPC classification G06G7/02. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 26 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).