US5047674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gallium arsenide antenna switch having voltage multiplier bias circuit
Assignee: Motorola Solutions Inc
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Filing: 1990-05-02
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Granted: 1991-09-10
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Expires: 2010-05-02
Abstract
Abstract A voltage multiplier rectifier filter circuit comprising capacitors C3 and C4 and diodes D1 and D3 multiples, rectifies and filters the voltage at an input terminal (T1) of the switch. A diode (D2) is connected to the output of the multiplier-rectifier-filter circuit to provide a lesser bias voltage in the absence of a signal at the input terminal (T1). Four transistors (Q1-Q4) switch this bias voltage ON and OFF to the gates of four GaAs transistors (S1-S4). The GaAs transistors selectively couple signals between the input and output signal terminals (T1-T4) of the switch.
Inventors
- 👤 Edward T. Clark
- 👤 Enrique Ferrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:48
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/52; H01Q1/521; H01Q1/525; H01Q3/00; H01Q3/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
141 words
A switch for coupling at least one terminal to a plurality of terminals, conprising in combination: first bias voltage means of multiplying the voltage of a signal at a first terminal of said switch, and for converting said signal to a first bias voltage: second bias voltage means for providing a second bias voltage in the absence of said at said first terminal; first signal switching means for coupling said first terminal to a second terminal of said switch; second signal switching means for coupling said second terminal to a third terminal of said switch; first bias switching means for coupling said first bias voltage to said first signal switching means in response to first control signal; and second bias switching means for coupling said second bias voltage to said second signal switching means in response to a second control signal.
Claim 2
Dependent Claim
141 words
A switch for coupling at least one terminal to a plurality of terminals, conprising in combination: first bias voltage means of multiplying the voltage of a signal at a first terminal of said switch, and for converting said signal to a first bias voltage: second bias voltage means for providing a second bias voltage in the absence of said at said first terminal; first signal switching means for coupling said first terminal to a second terminal of said switch; second signal switching means for coupling said second terminal to a third terminal of said switch; first bias switching means for coupling said first bias voltage to said first signal switching means in response to first control signal; and second bias switching means for coupling said second bias voltage to said second signal switching means in response to a second control signal.
Claim 3
Dependent Claim
86 words
The switch of claim 1, further comprising: third signal switching means for coupling said first terminal to a fourth terminal of said switch; fourth signal switching means for coupling said fourth terminal to said third terminal of said switch; third bias switching means for coupling said first bias voltage to said third signal switching means in response to a third control signal; and fourth bias switching means for coupling said second bias voltage to said fourth signal switching means in response to a fourth control signal.
Claim 4
Dependent Claim
140 words
A switch, comprising in combination: first bias voltage means for multiplying the voltage of a signal at a first terminal of said switch, and for converting said signal to a first bias voltage: second bias voltage means for providing a second bias voltage in the absence of said signal at said first terminal; a first GaAs transistor switch coupled between said first terminal and a second terminal of said switch; a second GaAs transistor switch coupled between said second terminal and a third terminal of said switch; first bias switching means for coupling said first bias voltage to a gate of said first GaAs transistor switch in response to a first control signal; and second bias switching means for coupling said second bias voltage to a gate of said second GaAs transistor switch in response to a second control signal.
Claim 5
Dependent Claim
140 words
A switch, comprising in combination: first bias voltage means for multiplying the voltage of a signal at a first terminal of said switch, and for converting said signal to a first bias voltage: second bias voltage means for providing a second bias voltage in the absence of said signal at said first terminal; a first GaAs transistor switch coupled between said first terminal and a second terminal of said switch; a second GaAs transistor switch coupled between said second terminal and a third terminal of said switch; first bias switching means for coupling said first bias voltage to a gate of said first GaAs transistor switch in response to a first control signal; and second bias switching means for coupling said second bias voltage to a gate of said second GaAs transistor switch in response to a second control signal.
Claim 6
Dependent Claim
94 words
The switch of claim 3, further comprising: a third GaAs transistor switch coupled between said first terminal and a fourth terminal of said switch; a fourth GaAs transistor switch coupled between said fourth terminal and said third terminal of said switch; third bias switching means for coupling said first bias voltage to a gate of said third GaAs transistor switch in response to a third control signal; and fourth bias switching means for coupling said second bias voltage to the gate of said fourth GaAs transistor switch in response to a fourth control signal.
Claim 7
Dependent Claim
45 words
The switch of claim 3, further comprising: a first bias resistor coupled between the gate of said first GaAs transistor switch and said first terminal; and a second bias resistor coupled between the gate of said second GaAs transistor switch and a power supply terminal.
Claim 8
Dependent Claim
29 words
The switch of claim 3, wherein said second bias voltage means includes a diode coupled between the output of said first bias voltage means and a power supply terminal.
Claim 9
Dependent Claim
45 words
The switch of claim 4, further comprising: a first bias resistor coupled beteen the gate of said first GaAs transistor switch and said first terminal; and a second bias resistor coupled between the gate of said second GaAs transistor switch and a power supply terminal.
Claim 10
Dependent Claim
29 words
The switch of claim 4, wherein said second bias voltage means includes a diode coupled between the output of said first bias voltage means and a power supply terminal.
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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) | 1994-09-09 | 1995-03-11 | 1995-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-09 | 1999-03-11 | 1999-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-09 | 2003-03-11 | 2003-09-10 | $7700.00 | Window Closed / Lapsed |