Patent US5109541A successfully refreshed from Google Patents.
US5109541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Car-mounted type booster system for hand-held phone
Assignee: Pantech Co Ltd
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Filing: 1990-11-16
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Granted: 1992-04-28
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Expires: 2010-11-16
Abstract
Abstract The present invention provides a car-mounted booster system comprising a first coupler, connected to the first duplexer and the power module, which regulates an output of the first duplexer; a first amplifier connected to the first coupler; an A/D converter connected to the first amplifier, which converts the analog output signal from the first amplifier to a predetermined digital code, and generates a transmission verification signal for verification of a fact whether the output signal from the first amplifier is a transmission signal or not; a second coupler connected to the second duplexer and the power module, which regulates an output of the second duplexer; a second amplifier connected to the second coupler; and a D/A converter connected to the A/D converter, the second amplifier, and the power module, which generates a control signal to control the power module according to a comparison result after comparison between a signal level from the second amplifier and a signal level from the A/D converter, and a power supply to the Power Module according to the transmission verification signal from the A/D converter.
Inventors
- 👤 Chan Hyun Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:21
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/3827; H04B1/3877; H04B1/40; H04B1/50; H04B1/52
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
248 words
In a car-mounted type booster system for hand-held phone comprising a first duplexer connected to the hand-held phone, a second duplexer connected to an external antenna, a low-noise amplifier compensating a loss due to an interconnection between the first duplexer and the second duplexer; and a power module interconnecting the first duplexer and the second duplexer, which sends a signal from the first duplexer to the second duplexer after amplification, the booster system further comprising: a first coupler, connected to the first duplexer and the power module, which regulates an output of the first duplexer; a first amplifier connected to the first coupler; an A/D converter connected to the first amplifier, which converts the analog output signal from the first amplifier to a predetermined digital code, and generates a transmission verification signal for verification of a fact whether the output signal from the first amplifier is a transmission signal or not; a second coupler connected to the second duplexer and the power module, which regulates an output of the second duplexer; a second amplifier connected to the second coupler; and a D/A converter connected to the A/D converter, the second amplifier, and the power module, which generates a control signal to control the power module according to a comparison result after comparison between a signal level from the second amplifier and a signal level from the A/D converter, the D/A converter applying power supply to the power module according to the transmission verification signal from the A/D converter.
Claim 2
Dependent Claim
248 words
In a car-mounted type booster system for hand-held phone comprising a first duplexer connected to the hand-held phone, a second duplexer connected to an external antenna, a low-noise amplifier compensating a loss due to an interconnection between the first duplexer and the second duplexer; and a power module interconnecting the first duplexer and the second duplexer, which sends a signal from the first duplexer to the second duplexer after amplification, the booster system further comprising: a first coupler, connected to the first duplexer and the power module, which regulates an output of the first duplexer; a first amplifier connected to the first coupler; an A/D converter connected to the first amplifier, which converts the analog output signal from the first amplifier to a predetermined digital code, and generates a transmission verification signal for verification of a fact whether the output signal from the first amplifier is a transmission signal or not; a second coupler connected to the second duplexer and the power module, which regulates an output of the second duplexer; a second amplifier connected to the second coupler; and a D/A converter connected to the A/D converter, the second amplifier, and the power module, which generates a control signal to control the power module according to a comparison result after comparison between a signal level from the second amplifier and a signal level from the A/D converter, the D/A converter applying power supply to the power module according to the transmission verification signal from the A/D converter.
Claim 3
Dependent Claim
82 words
A booster system according to claim 1, the A/D converter comprising: a first comparator comparing the output level from the first amplifier with a predetermined reference level; a second comparator, comparing an output of the first comparator with a predetermined reference level, which generates the transmission verification signal; logarithmic scale bar graph IC's receiving the output from the first comparator, which code an input voltage level into a specific digital code; and an encoder connected to the logarithmic scale bar graph IC's.
Claim 4
Dependent Claim
222 words
In a car-mounted type booster system for hand-held phone comprising a first duplexer connected to the hand-held phone; a second duplexer connected to an external antenna; a low-noise amplifier interconnected between the first duplexer and the second duplexer, which compensates a loss due to the interconnection; and a power module which sends a signal from the first duplexer to the second duplexer after power amplification, the booster system further comprising: a first coupler connected to the first duplexer and the power module, which regulates an output of the first duplexer; a first amplifier connected to the first coupler; a second coupler connected to the second duplexer and the power module, which regulates an output of the power module; a second amplifier connected to the second coupler; and a power control means connected to the first amplifier, the second amplifier, and the power module which controls the power module according to a control signal, generated after a comparison between an output signal level from the first amplifier and an output signal level from the second amplifier, and applies power to the power module according to a transmission verification signal generated for verification that decides whether a signal from the first amplifier is a transmission signal or not after a comparison between a signal level from the first amplifier and a predetermined reference level.
Claim 5
Dependent Claim
222 words
In a car-mounted type booster system for hand-held phone comprising a first duplexer connected to the hand-held phone; a second duplexer connected to an external antenna; a low-noise amplifier interconnected between the first duplexer and the second duplexer, which compensates a loss due to the interconnection; and a power module which sends a signal from the first duplexer to the second duplexer after power amplification, the booster system further comprising: a first coupler connected to the first duplexer and the power module, which regulates an output of the first duplexer; a first amplifier connected to the first coupler; a second coupler connected to the second duplexer and the power module, which regulates an output of the power module; a second amplifier connected to the second coupler; and a power control means connected to the first amplifier, the second amplifier, and the power module which controls the power module according to a control signal, generated after a comparison between an output signal level from the first amplifier and an output signal level from the second amplifier, and applies power to the power module according to a transmission verification signal generated for verification that decides whether a signal from the first amplifier is a transmission signal or not after a comparison between a signal level from the first amplifier and a predetermined reference level.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-28 | 1995-10-28 | 1996-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-28 | 1999-10-28 | 2000-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-28 | 2003-10-28 | 2004-04-28 | $7700.00 | Window Closed / Lapsed |