Patent US5440262A successfully refreshed from Google Patents.
US5440262A
Expired / Lapsed
US
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High-efficiency Ring/MWL generator
Assignee: SIEMENS ENTERPRISE COMMUNICATIONS Inc
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Filing: 1993-08-24
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Granted: 1995-08-08
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Expires: 2013-08-24
Abstract
Abstract An embodiment of the present invention is a power generator which provides a power waveform for applying power to ringing circuits and message-waiting lamps (Ring/MWL) in standard analog telephones in a PBX and which power generator reduces power dissipation. In particular, an embodiment of the inventive power generator includes: (a) a controller which generates a low-level signal representing the power waveform and a timing and control signal indicative of various portions of the low-level analog signal; (b) a circuit, responsive to the timing and control signal, which alters the output of a power supply; and (c) a power amplifier, responsive to the low-level signal and the output of the power supply, which amplifies the low-level signal to produce the power waveform.
Inventors
- 👤 Jack G. S. Lum
- 👤 Peter Pong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:44
CPC Classifications
H; H04; H04M; H04M19/00; H04M19/02; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
82 words
A power wave form generator for producing a power waveform which comprises: means for generating a low-level analog signal representing the power waveform; means for generating a timing and control signal indicative of various portions of the low-level analog signal; means, responsive to the timing and control signal, for altering the output of a power supply; and means, responsive to the low-level analog signal and the output of the power supply, for amplifying the low-level analog signal to produce the power waveform.
Claim 2
Dependent Claim
82 words
A power wave form generator for producing a power waveform which comprises: means for generating a low-level analog signal representing the power waveform; means for generating a timing and control signal indicative of various portions of the low-level analog signal; means, responsive to the timing and control signal, for altering the output of a power supply; and means, responsive to the low-level analog signal and the output of the power supply, for amplifying the low-level analog signal to produce the power waveform.
Claim 3
Dependent Claim
18 words
The power generator of claim 1 wherein the means for generating a low-level signal comprises a microprocessor controller.
Claim 4
Dependent Claim
19 words
The power generator of claim 2 wherein the means for generating a low-level signal further comprises a D/A converter.
Claim 5
Dependent Claim
20 words
The power generator of claim 1 wherein the means for generating a timing and control signal comprises a microprocessor controller.
Claim 6
Dependent Claim
18 words
The power generator of claim 1 wherein the means for amplifying the low-level signal comprises a power amplifier.
Claim 7
Dependent Claim
78 words
A power waveform generator for producing a power waveform which comprises: means for generating a low-level signal representing the power waveform and for generating a timing and control signal indicative of various portions of the low-level analog signal; means, responsive to the timing and control signal, for altering the output of a power supply; and means, responsive to the low-level signal and the output of the power supply, for amplifying the low-level signal to produce the power waveform.
Claim 8
Dependent Claim
78 words
A power waveform generator for producing a power waveform which comprises: means for generating a low-level signal representing the power waveform and for generating a timing and control signal indicative of various portions of the low-level analog signal; means, responsive to the timing and control signal, for altering the output of a power supply; and means, responsive to the low-level signal and the output of the power supply, for amplifying the low-level signal to produce the power waveform.
Claim 9
Dependent Claim
18 words
The power generator of claim 6 wherein the means for generating a low-level signal comprises a microprocessor controller.
Claim 10
Dependent Claim
19 words
The power generator of claim 7 wherein the means for generating a low-level signal further comprises a D/A converter.
Claim 11
Dependent Claim
20 words
The power generator of claim 6 wherein the means for generating a timing and control signal comprises a microprocessor controller.
Claim 12
Dependent Claim
18 words
The power generator of claim 6 wherein the means for amplifying the low-level signal comprises a power amplifier.
References Cited (Backward Citations)
US5230018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-08-07 | 1999-02-06 | 1999-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-07 | 2003-02-06 | 2003-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-07 | 2007-02-06 | 2007-08-08 | $7700.00 | Window Closed / Lapsed |