US5525895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply for portable telephone
Assignee: AT&T Inc
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Filing: 1994-10-27
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Granted: 1996-06-11
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Expires: 2014-10-27
Abstract
Abstract A power supply for a portable telephone, includes a battery pack comprised of at least one battery cell providing an unregulated output voltage; a boost/buck switcher connected with the battery pack for boosting/bucking the output voltage to a different level; a first regulator connected with the boost/buck switcher for regulating the boosted/bucked output voltage to produce a first regulated voltage; a second regulator connected with the boost/buck switcher for regulating the boosted/bucked output voltage to produce a second regulated voltage having a voltage value different from the first regulated voltage; an EMI shielded case surrounding the battery pack, the boost/buck switcher, the first regulator and the second regulator; a first output terminal connected to the battery pack and supplied with the output voltage; a second output terminal connected with the first regulator and supplied with the first regulated voltage from the first regulator; and a second output terminal connected with the second regulator and supplied with the second regulated voltage from the second regulator.
Inventors
- 👤 David A Fishman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:23
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
82 words
A power supply comprising: at least one battery cell providing an unregulated output voltage; a boost/buck switcher connected with said at least one battery cell for boosting/bucking said output voltage to a different level; a regulator connected with said boost/buck switcher for regulating said boosted/bucked output voltage to produce a regulated voltage; and an EMI shield encasing said at least one battery cell, said boost/buck switcher, and said regulator to prevent emission of electromagnetic radiation due to switching of said boost/buck switcher.
Claim 2
Dependent Claim
82 words
A power supply comprising: at least one battery cell providing an unregulated output voltage; a boost/buck switcher connected with said at least one battery cell for boosting/bucking said output voltage to a different level; a regulator connected with said boost/buck switcher for regulating said boosted/bucked output voltage to produce a regulated voltage; and an EMI shield encasing said at least one battery cell, said boost/buck switcher, and said regulator to prevent emission of electromagnetic radiation due to switching of said boost/buck switcher.
Claim 3
Dependent Claim
23 words
A power supply according to claim 1, wherein said at least one battery cell includes a plurality of battery cells connected in series.
Claim 4
Dependent Claim
17 words
A power supply according to claim 2, wherein there are three said battery cells connected in series.
Claim 5
Dependent Claim
24 words
A power supply according to claim 1, wherein said output voltage is an unregulated voltage in the range of approximately 3.0 to 4.2 volts.
Claim 6
Dependent Claim
26 words
A power supply according to claim 1, further including an output terminal connected to said at least one battery cell and supplied with said output voltage.
Claim 7
Dependent Claim
25 words
A power supply according to claim 1, further including an output terminal connected with said regulator and supplied with the regulated voltage from said regulator.
Claim 8
Dependent Claim
21 words
A power supply according to claim 1, wherein said at least one battery cell includes a negative terminal connected to ground.
Claim 9
Dependent Claim
117 words
A power supply comprising: at least one battery cell supplying an unregulated output voltage; a boost/buck switcher connected with said at least one battery cell for boosting/bucking said output voltage to a different level; a first regulator connected with said boost/buck switcher for regulating said boosted/bucked output voltage to produce a regulated voltage; a second regulator connected with said boost/buck switcher for regulating said boosted/bucked output voltage to produce a second regulated voltage having a voltage value different from said first regulated voltage; and an EMI shield encasing said at least one battery cell, said boost/buck switcher, said first regulator and said second regulator to prevent emission of electromagnetic radiation due to switching of said boost/buck switcher.
Claim 10
Dependent Claim
117 words
A power supply comprising: at least one battery cell supplying an unregulated output voltage; a boost/buck switcher connected with said at least one battery cell for boosting/bucking said output voltage to a different level; a first regulator connected with said boost/buck switcher for regulating said boosted/bucked output voltage to produce a regulated voltage; a second regulator connected with said boost/buck switcher for regulating said boosted/bucked output voltage to produce a second regulated voltage having a voltage value different from said first regulated voltage; and an EMI shield encasing said at least one battery cell, said boost/buck switcher, said first regulator and said second regulator to prevent emission of electromagnetic radiation due to switching of said boost/buck switcher.
Claim 11
Dependent Claim
23 words
A power supply according to claim 8, wherein said at least one battery cell includes a plurality of battery cells connected in series.
Claim 12
Dependent Claim
17 words
A power supply according to claim 9, wherein there are three said battery cells connected in series.
Claim 13
Dependent Claim
24 words
A power supply according to claim 8, wherein said output voltage is an unregulated voltage in the range of approximately 3.0 to 4.2 volts.
Claim 14
Dependent Claim
68 words
A power supply according to claim 8, further including: a first output terminal connected to said at least one battery cell and supplied with said output voltage; a second output terminal connected with said first regulator and supplied with the first regulated voltage from said first regulator; and a third output terminal connected with said second regulator and supplied with the second regulated voltage from said second regulator.
Claim 15
Dependent Claim
37 words
A power supply according to claim 12, wherein said output voltage is in the range of 3.0 to 4.2 volts, said first regulated voltage is approximately 5.4 volts and said second regulated voltage is approximately 5.0 volts.
Claim 16
Dependent Claim
115 words
A portable phone comprising: an RF power amplifier; at least one battery cell supplying an unregulated output voltage; a boost/buck switcher connected with said at least one battery cell for boosting/bucking said unregulated output voltage to a boosted/bucked output voltage at a different level from that of said at least one battery cell; a regulator connected to an output of said boost/buck switcher for regulating said boosted/bucked output voltage to produce a regulated voltage; means for supplying said regulated voltage to said RF power amplifier; and an EMI shield enclosing said at least one battery cell, said boost/buck switcher, and said regulator to prevent emission of electromagnetic radiation due to switching of said boost/buck switcher.
Claim 17
Dependent Claim
115 words
A portable phone comprising: an RF power amplifier; at least one battery cell supplying an unregulated output voltage; a boost/buck switcher connected with said at least one battery cell for boosting/bucking said unregulated output voltage to a boosted/bucked output voltage at a different level from that of said at least one battery cell; a regulator connected to an output of said boost/buck switcher for regulating said boosted/bucked output voltage to produce a regulated voltage; means for supplying said regulated voltage to said RF power amplifier; and an EMI shield enclosing said at least one battery cell, said boost/buck switcher, and said regulator to prevent emission of electromagnetic radiation due to switching of said boost/buck switcher.
Claim 18
Dependent Claim
25 words
The portable telephone according to claim 14 further comprising: circuitry operable using unregulated voltage; and means for supplying said unregulated output voltage to said circuitry.
Claim 19
Dependent Claim
51 words
The portable telephone according to claim 15 further comprising: circuitry requiring regulated voltage; a second regulator connected to an output of said boost/buck switcher for regulating said boosted/bucked output voltage to produce a second regulated voltage; and means for supplying said second regulated output voltage to said circuitry requiring regulated voltage.
Claim 20
Dependent Claim
51 words
The portable telephone according to claim 14 further comprising: circuitry requiring regulated voltage; a second regulator connected to an output of said boost/buck switcher for regulating said boosted/bucked output voltage to produce a second regulated voltage; and means for supplying said second unregulated output voltage to said circuitry requiring regulated voltage.
Claim 21
Dependent Claim
36 words
The portable telephone according to claim 14 further comprising said EMI shield including a casing for enclosing said at least one battery cell, said boost/buck switcher, and said regulator to provide a shielded power supply assembly.
Claim 22
Dependent Claim
40 words
The portable telephone according to claim 16 further comprising said EMI shield including a casing for enclosing said at least one battery cell, said boost/buck switcher, and said regulator and said second regulator to provide a shielded power supply assembly.
Claim 23
Dependent Claim
40 words
The portable telephone according to claim 17 further comprising said EMI shield including a casing for enclosing said at least one battery cell, said boost/buck switcher, and said regulator and said second regulator to provide a shielded power supply assembly.
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) | 1999-06-11 | 1999-12-11 | 2000-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-11 | 2003-12-11 | 2004-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-11 | 2007-12-11 | 2008-06-11 | $7700.00 | Window Closed / Lapsed |