US6144288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote wireless switch sensing circuit using RF transceiver in combination with a SAW chirp processor
Assignee: Delphi Technologies Inc
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Filing: 1997-03-28
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Granted: 2000-11-07
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Expires: 2017-03-28
Abstract
Abstract A circuit assembly senses a state of a variable state device, wherein a data signal representative of the state is communicated via wireless telegraphy. A surface acoustic wave (SAW) device, having a plurality of interdigital transducers (IDTs) comprises a wave launching IDT and a state information IDT, wherein the plurality of IDTs are in acoustical communication and the state information IDT is in electrical communication with an antenna through the variable state device. An RF transceiver communicates a trigger signal to the SAW device, wherein the trigger signal causes a launching of a SAW wave from the wave launching IDT towards the state information IDT. The state information IDT generates a signal pulse in response thereto and communicates the pulse to the antenna through the variable state device. A transceiver control module, in operative communication with the RF transceiver enables communication of the trigger signal and reads the data signal, wherein the trigger signal and data signal are communicated between the RF transceiver in the SAW device via wireless telegraphy.
Inventors
- 👤 Ronald R. Jahn
- 👤 Ruth E. Hubbell
- 👤 David L. McClanahan
- 👤 Walter L. Rutchik
- 👤 Gordon Barr Spellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:40
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/067
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
212 words
A circuit assembly for sensing a state of a variable state device wherein a data signal representative of the state is communicated via wireless telegraphy comprising: a surface acoustic wave (SAW) device having a plurality of interdigital transducers (IDTs) comprising a wave launching IDT and a state information IDT wherein the plurality of IDTs are in acoustical communication and the state information IDT is in selective electrical communication with an antenna by the variable state device, the variable state device being disposed to selectively interrupt the electrical communication between the state information IDT and the antenna; an RF transceiver for communicating a trigger signal to the SAW device wherein the trigger signal causes a launching of a SAW wave from the wave launching IDT towards the state information IDT and the state information IDT generates an electrical signal pulse in response thereto, said electrical signal pulse being selectively communicated to the antenna through said variable state device; and, a transceiver control module in operative communication with the RF transceiver for enabling communication of the trigger signal and for reading the data signal comprising an absence or presence of the signal pulse wherein the trigger signal and the data signal are communicated between the RF transceiver and the SAW device via wireless telegraphy.
Claim 2
Dependent Claim
212 words
A circuit assembly for sensing a state of a variable state device wherein a data signal representative of the state is communicated via wireless telegraphy comprising: a surface acoustic wave (SAW) device having a plurality of interdigital transducers (IDTs) comprising a wave launching IDT and a state information IDT wherein the plurality of IDTs are in acoustical communication and the state information IDT is in selective electrical communication with an antenna by the variable state device, the variable state device being disposed to selectively interrupt the electrical communication between the state information IDT and the antenna; an RF transceiver for communicating a trigger signal to the SAW device wherein the trigger signal causes a launching of a SAW wave from the wave launching IDT towards the state information IDT and the state information IDT generates an electrical signal pulse in response thereto, said electrical signal pulse being selectively communicated to the antenna through said variable state device; and, a transceiver control module in operative communication with the RF transceiver for enabling communication of the trigger signal and for reading the data signal comprising an absence or presence of the signal pulse wherein the trigger signal and the data signal are communicated between the RF transceiver and the SAW device via wireless telegraphy.
Claim 3
Dependent Claim
24 words
The circuit assembly as defined in claim 1 wherein the variable state device comprises an operator controlled switch disposed on a vehicle steering wheel.
Claim 4
Dependent Claim
49 words
The circuit assembly as defined in claim 1 wherein the data signal comprises a waveform including a start pulse and a stop pulse, a state information pulse intermediate thereof wherein the absence or presence of the state information pulse is representative of the state of the variable state device.
Claim 5
Dependent Claim
21 words
The circuit assembly as defined in claim 3 wherein said variable state device includes means for determining said absence or presence.
Claim 6
Dependent Claim
24 words
The circuit assembly as defined in claim 1 wherein the variable state device is disposed serially between the state information IDT and the antenna.
Claim 7
Dependent Claim
35 words
The circuit assembly as defined in claim 5 wherein the variable state device comprises a switch which in an open state precludes transmission of the signal pulse from the state information IDT to the antenna.
Claim 8
Dependent Claim
39 words
The circuit assembly as defined in claim 6 wherein a plurality of state information IDTs are disposed on said SAW device, each of said plurality being respectively associated with a one of a plurality of distinct variable state devices.
Claim 9
Dependent Claim
22 words
The circuit assembly as defined in claim 7 wherein said plurality of variable state devices are in parallel communication to the antenna.
Claim 10
Dependent Claim
64 words
The circuit assembly as defined in claim 8 wherein said plurality of state information IDTs are disposed to generate the data signal as a pulse train comprised of a plurality of pulse signals, the respective absence or presence of the pulse signal at a predetermined position in the pulse train being representative of a state of the associated one of the variable state devices.
References Cited (Backward Citations)
US3289114A
Cited
US3479572A
Cited
US3648081A
Cited
US4464597A
Cited
US4663746A
Cited
US4931664A
Cited
US4945354A
Cited
US4994798A
Cited
US5565825A
Cited
US5568002A
Cited
US5568001A
Cited
US5717367A
Cited
US5838091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-11-07 | 2004-05-08 | 2004-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-07 | 2008-05-08 | 2008-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-07 | 2012-05-08 | 2012-11-07 | $7700.00 | Window Closed / Lapsed |