Stochastic signal density modulation for optical transducer control
US-9226355-B1 · Dec 29, 2015 · US
Stochastic signal density modulation for optical transducer control
US9750097B1 · US · B1
| Field | Value |
|---|---|
| Publication number | US-9750097-B1 |
| Application number | US-201514944388-A |
| Country | US |
| Kind code | B1 |
| Filing date | Nov 18, 2015 |
| Priority date | Nov 13, 2006 |
| Publication date | Aug 29, 2017 |
| Grant date | Aug 29, 2017 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A controller for optical transducers uses stochastic signal density modulation to reduce electromagnetic interference.
First claim
Opening claim text (preview).
What is claimed is: 1. A method comprising: generating a first signal with a stochastic density; comparing the first signal to an input signal with a density register value; generating a modulation signal from the comparing the first signal and input signal; and driving a controllable current supply with the modulation signal, the controllable current supply coupled to a light-emitting diode (LED). 2. The method of claim 1 , wherein the first signal is based upon a pseudorandom number. 3. The method of claim 1 , wherein the controllable current source is configured to modulate a brightness of the LED. 4. An apparatus comprising: a controllable current supply coupled to a light-emitting diode (LED); a stochastic signal density modulator (SSDM) coupled to the controllable current supply, wherein the SSDM is configured to provide a pseudorandom stochastic control signal to the controllable current supply, the pseudorandom stochastic control signal to control a light intensity output of the LED and to reduce electromagnetic interference, and derived from an output of the SSDM and a signal density register. 5. The apparatus of claim 4 , wherein the SSDM comprises a stochastic state machine and is configured to generate a plurality of stochastic values.
Assignees
Inventors
Classifications
Controlling the intensity of the light · CPC title
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
- H05B33/0818Primary
Electricity · mapped topic
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9750097B1 cover?
- A controller for optical transducers uses stochastic signal density modulation to reduce electromagnetic interference.
- Who is the assignee on this patent?
- Cypress Semiconductor Corp
- What technology area does this patent fall under?
- Primary CPC classification H05B33/0818. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 29 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B1). 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).