Patent US5998978A successfully refreshed from Google Patents.
US5998978A
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Apparatus and method for reducing energy fluctuations in a portable data device
Assignee: Google Technology Holdings LLC
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Filing: 1998-06-29
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Granted: 1999-12-07
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Expires: 2018-06-29
Abstract
Abstract A portable data device employs an integrated circuit having a signal processor that receives a power signal from an external source via a power node. A decoupling device is placed between the power node and the signal processor. An energy reservoir is placed in parallel with the signal processor, which acts in concert with the decoupling device to isolate the effects of the signal processor from the rest of the integrated circuit.
Inventors
- 👤 Lawrence Edwin Connell
- 👤 Patrick Lee Rakers
- 👤 Timothy James Collins
- 👤 Donald Bernard Lemersal, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:40
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
53 words
An integrated circuit, comprising: a digital signal processor that receives a power signal from an external source via a power node; a decoupling device disposed between the power node and the digital signal processor; and an energy reservoir disposed in parallel with the digital signal processor and operably coupled to the decoupling device.
Claim 2
Dependent Claim
53 words
An integrated circuit, comprising: a digital signal processor that receives a power signal from an external source via a power node; a decoupling device disposed between the power node and the digital signal processor; and an energy reservoir disposed in parallel with the digital signal processor and operably coupled to the decoupling device.
Claim 3
Dependent Claim
30 words
The integrated circuit of claim 1, wherein the power node comprises an impedance network, and wherein the integrated circuit further comprises a power rectifier operably coupled to the impedance network.
Claim 4
Dependent Claim
18 words
The integrated circuit of claim 1, wherein the decoupling circuit comprises a transistor operating as a current source.
Claim 5
Dependent Claim
23 words
The integrated circuit of claim 3, wherein the current source comprises a current mirror circuit coupled in series with a reference current circuit.
Claim 6
Dependent Claim
13 words
The integrated circuit of claim 1, wherein the energy reservoir comprises a capacitor.
Claim 7
Dependent Claim
54 words
The integrated circuit of claim 1, wherein power to the integrated circuit is supplied via an amplitude shift keyed (ASK) modulated input power signal, and wherein the decoupling device is characterized by an impedance that varies at a rate substantially less than an input data edge rate of the ASK modulated input power signal.
Claim 8
Dependent Claim
55 words
A portable data device, comprising: a power node for receiving a power signal from an external source; and an integrated circuit, comprising; a digital processor; a decoupling device disposed between the power node and the digital processor; and an energy reservoir disposed in parallel with the digital processor and operably coupled to the decoupling device.
Claim 9
Dependent Claim
55 words
A portable data device, comprising: a power node for receiving a power signal from an external source; and an integrated circuit, comprising; a digital processor; a decoupling device disposed between the power node and the digital processor; and an energy reservoir disposed in parallel with the digital processor and operably coupled to the decoupling device.
Claim 10
Dependent Claim
31 words
The portable data device of claim 7, wherein the power node further comprises an impedance network, and wherein the impedance network further comprises a capacitive circuit coupled to the decoupling device.
Claim 11
Dependent Claim
16 words
The portable data device of claim 7, wherein the decoupling circuit comprises a variable current source.
Claim 12
Dependent Claim
19 words
The portable data device of claim 9, wherein the variable current source comprises a transistor operating as current source.
Claim 13
Dependent Claim
32 words
The portable data device of claim 7, wherein the power node comprises a first and second terminal pad, positioned on the portable data device to receive power from a data communications terminal.
Claim 14
Dependent Claim
55 words
The portable data device of claim 7, wherein power to the integrated circuit is supplied via an amplitude shift keyed (ASK) modulated input power signal, and wherein the decoupling device is characterized by an impedance that varies at a rate substantially less than an input data edge rate of the ASK modulated input power signal.
Claim 15
Dependent Claim
53 words
A portable data device, comprising: an integrated circuit, comprising; a digital processor; an impedance network operably coupled to the digital processor; a variable current source disposed between the impedance network and the digital processor; and an energy reservoir disposed in parallel with the digital processor wherein the impedance network comprises a capacitive circuit.
Claim 16
Dependent Claim
53 words
A portable data device, comprising: an integrated circuit, comprising; a digital processor; an impedance network operably coupled to the digital processor; a variable current source disposed between the impedance network and the digital processor; and an energy reservoir disposed in parallel with the digital processor wherein the impedance network comprises a capacitive circuit.
Claim 17
Dependent Claim
25 words
The portable data device of claim 13, wherein the variable current source comprises a current mirror circuit coupled in series with a reference current circuit.
Claim 18
Dependent Claim
12 words
The portable data device of claim 13, wherein the energy reservoir capacitor.
Claim 19
Dependent Claim
17 words
The integrated circuit of claim 1, further comprising a capacitor connected in parallel with the power node.
Claim 20
Dependent Claim
62 words
An integrated circuit, comprising: a digital signal processor that receives a power signal from an external source via a power node; a capacitor in connected in parallel with the power node; a decoupling device disposed between the power node and the digital signal processor; and an energy reservoir connected in parallel with the digital signal processor and coupled to the decoupling device.
Claim 21
Dependent Claim
62 words
An integrated circuit, comprising: a digital signal processor that receives a power signal from an external source via a power node; a capacitor in connected in parallel with the power node; a decoupling device disposed between the power node and the digital signal processor; and an energy reservoir connected in parallel with the digital signal processor and coupled to the decoupling device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-12-06 | 2003-06-07 | 2003-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-12-06 | 2007-06-07 | 2007-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-12-06 | 2011-06-07 | 2011-12-07 | $7700.00 | Window Closed / Lapsed |