US 8,260,213 Method and apparatus to adjust a tunable reactive element
5 defendants · 5 suits · updated September 14, 2026
Also cited as U.S. Patent No. 8,260,213 · US8260213B2 · US 8,260,213 B2 · 8260213 · the '213 patent
Velocity Communication Technologies, LLC has filed 5 patent-infringement suits on US 8,260,213, "Method and apparatus to adjust a tunable reactive element" since July 30, 2026, 3 of them in the E.D. Tex., against 5 distinct defendants including Arcadyan Technology Corporation, Calix, Inc. and Sercomm Corporation. The patent was granted September 4, 2012 on a priority date of September 15, 2008. Its abstract opens: "A system that incorporates teachings of the present disclosure may include, for example, a method involving a step to tune a plurality of tunable reactive elements by measuring a drift in reactance of at least one of the plurality of tunable reactive elements…" The examiner cited 8 references during prosecution.
- Assignee
- Velocity Communication Technologies LLC
- Priority date
- September 15, 2008
- Granted
- September 4, 2012
- Expires
- September 15, 2028
- Status
- Active - Reinstated
- Claims
- 32 (3 independent)
- Inventors
- Shamsuddin H. Chasmawala, Matthew R. Greene
- Full text
- Google Patents
The suits
5 cases · E.D. Tex. (3) · D. Del. (2)
| Filed | Defendant | Plaintiff | Court | Docket |
|---|---|---|---|---|
| 2026-07-30 | Arcadyan Technology Corporation | Velocity Communication Technologies, LLC | E.D. Tex. | 5:26-cv-00102 |
| 2026-07-30 | Calix, Inc. | Velocity Communication Technologies, LLC | D. Del. | 1:26-cv-00937 |
| 2026-07-30 | Sercomm Corporation | Velocity Communication Technologies, LLC | E.D. Tex. | 5:26-cv-00101 |
| 2026-07-30 | TCL Electronics Holdings Limited | Velocity Communication Technologies, LLC | E.D. Tex. | 5:26-cv-00103 |
| 2026-07-30 | Vistance Networks, Inc. | Velocity Communication Technologies, LLC | D. Del. | 1:26-cv-00944 |
Docket links open the public record on CourtListener. Filing dates are the complaint's.
Independent claims
What is actually asserted, verbatim.
1. A device, comprising: a signal source coupled to a first tunable reactive element to generate a first signal; a reactance detection circuit to: detect from the first signal a reactance of the first tunable reactive element, and generate a second signal that represents the reactance; and an error correction circuit to: receive a control signal that represents a desired reactance of the first tunable reactive element, detect from a comparison of the control signal to the second signal a drift from the desired reactance, and generate a third signal to adjust the reactance of the first tunable reactive element to achieve the desired reactance.
19. A tunable matching network, comprising: a first tunable reactive element; and a second tunable reactive element, wherein the first and second tunable reactive elements are tuned to a desired reactance by a control signal and a device operable to adjust a reactance of the first and second tunable reactive elements when the desired reactance is not achieved, wherein the device comprises: a signal source coupled to the first tunable reactive element that generates a first signal, a reactance detection circuit that receives the first signal and therefrom generates a second signal that represents a reactance of the first tunable reactive element, and an error correction circuit that receives the control signal and the second signal and therefrom generates a third signal that adjusts the reactance of the first tunable reactive element to achieve the desired reactance.
22. A method, comprising: receiving a first signal from a signal source coupled to a first tunable reactive element; producing according to the first signal a second signal representing a measure of reactance of the first tunable reactive element; receiving a control signal representing a desired reactance of the first tunable reactive element; utilizing a processing circuit to compare the second signal to the control signal to produce a difference signal; integrating the difference signal to produce a third signal; and applying the third signal to the first tunable reactive element to reduce a difference between the measured reactance and the desired reactance.
Art before the examiner
8 references of record, 8 cited by the examiner.
Everything listed here was before the Office and is what a challenge must go beyond. Art the examiner never saw is where an invalidity search starts.
Examiner-cited
- US4365119A — Automatically adjustable bidirectional-to-unidirectional transmission network (Bell Telephone Laboratories, Incorporated)
- US5589844A — Automatic antenna tuner for low-cost mobile radio (Flash Comm, Inc.)
- US6920315B1 — Multiple antenna impedance optimization (Ericsson Inc.)
- US7057472B2 — Bypass filter, multi-band antenna switch circuit, and layered module composite part and communication device using them (Hitachi Metals, Ltd.)
- US7174147B2 — Bandpass filter with tunable resonator (Kyocera Wireless Corp.)
- US7277677B2 — Control device for antenna matching circuit (Fujitsu Limited)
- US7512384B2 — Control unit and a control method (Fujitsu Limited)
- US7706759B2 — RF reception system with programmable impedance matching networks and methods for use therewith (Broadcom Corporation)
Classification
- H03J3/06primary — Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges
Family
- US8260213B2 — B2 (2012)
- US20100069029A1 — A1 (2010)
Abstract
A system that incorporates teachings of the present disclosure may include, for example, a method involving a step to tune a plurality of tunable reactive elements by measuring a drift in reactance of at least one of the plurality of tunable reactive elements away from a desired reactance. Additional embodiments are disclosed.
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This page is assembled from public records — federal court dockets and the patent's own file — and is updated as the case list changes. It states what the record shows and is not an opinion on the validity or infringement of any claim. Patent data via Google Patents; docket data via CourtListener.