US5216378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch adaptable radio frequency amplifier
Assignee: Motorola Solutions Inc
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Filing: 1992-03-02
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Granted: 1993-06-01
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Expires: 2012-03-02
Abstract
Abstract A radio frequency variable gain amplifier (204) has a plurality of outputs. The amplifier (204) includes a transistor amplifier (330) having a plurality of switchable fixed gain states for amplifying an oscillator signal. The amplifier (204) includes a biasing circuit (302, 306, 312, and 316) for selectively biasing the transistor amplifier (330) to produce the plurality of switchable fixed gain states. The biasing circuit (302, 306, 312, and 316) includes switches (310 and 320) for switching between the switchable fixed gain states of the transistor amplifier (330).
Inventors
- 👤 Stephen B. Einbinder
- 👤 Eric K. Schroeter
- 👤 Leng H. Ooi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:27
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/50; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3036; H03G3/3042; H04B1/403; H04B1/408
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A radio frequency amplifier, comprising: amplifier means having a gain for amplifying an input signal to selectively produce at least a first signal at a first output and at least a second signal at a second output; biasing means for biasing the amplifier means, the biasing means having at least a first and a second state for setting the gain of the amplifier means in producing the 1st and 2nd signals, respectively; and switching means for switching the states of the biasing means.
Claim 2
Dependent Claim
83 words
A radio frequency amplifier, comprising: amplifier means having a gain for amplifying an input signal to selectively produce at least a first signal at a first output and at least a second signal at a second output; biasing means for biasing the amplifier means, the biasing means having at least a first and a second state for setting the gain of the amplifier means in producing the 1st and 2nd signals, respectively; and switching means for switching the states of the biasing means.
Claim 3
Dependent Claim
27 words
The radio frequency variable gain amplifier of claim 1, further including a plurality of matching networks for coupling the plurality of outputs to a plurality of loads.
Claim 4
Dependent Claim
15 words
The radio frequency amplifier of claim 1, wherein the amplifier means includes a transistor amplifier.
Claim 5
Dependent Claim
17 words
The radio frequency variable gain amplifier of claim 1, wherein the biasing means includes the switching means.
Claim 6
Dependent Claim
17 words
The radio frequency variable gain amplifier of claim 1, wherein the switching means includes a PIN diode.
Claim 7
Dependent Claim
66 words
A radio communication device, comprising: a transmitter having a power amplifier; a receiver having a mixer; an oscillator for providing a radio frequency frequency signal; and an amplifier means coupled to the oscillator and having a first gain state for amplifying and coupling the radio frequency signal to the transmitter and a second gain state for amplifying and coupling the radio frequency signal to the receiver.
Claim 8
Dependent Claim
66 words
A radio communication device, comprising: a transmitter having a power amplifier; a receiver having a mixer; an oscillator for providing a radio frequency frequency signal; and an amplifier means coupled to the oscillator and having a first gain state for amplifying and coupling the radio frequency signal to the transmitter and a second gain state for amplifying and coupling the radio frequency signal to the receiver.
Claim 9
Dependent Claim
29 words
The radio communication device of claim 6, wherein the amplifier means includes biasing means for selectively biasing the amplifier means to produce the plurality of switchable fixed gains states.
Claim 10
Dependent Claim
25 words
The radio communication device of claim 7, wherein the biasing means includes switching means for selectively switching between the plurality of switchable fixed gain states.
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) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |