Claims
- 1. An amplifier comprising:a first signal path having a scaling amplifier in series with a main amplifier; a second signal path having a replica amplifier in series with a correction amplifier; a combining node that combines the first signal path and the second signal path; and wherein the main amplifier has a gain of A, the replica amplifier has a gain of A, the scaling amplifier has a gain of 1/β, and the correction amplifier has a gain of 1/β3.
- 2. The amplifier of claim 1 further comprising:a first non-inverting buffer coupled between the scaling amplifier and the main amplifier; and a second non-inverting buffer coupled between the correction amplifier and the combining node.
- 3. The amplifier of claim 2 wherein the scaling amplifier is a resistive voltage divider and the correction amplifier is a resistive voltage divider.
- 4. The amplifier of claim 3 wherein the scaling amplifier has a gain of 1/zβ, the first non-inverting buffer has a gain of z, the correction amplifier has a gain of 1/zβ3, and the second non-inverting buffer has a gain of z.
- 5. The amplifier of claim 1 wherein the combining node is a summing node.
- 6. An amplifier comprising:a first signal path having a phase matching element in series with a main amplifier; a second signal path having a scaling amplifier, a replica amplifier, and a correction amplifier coupled in series; a combining node for combining an output of the first signal path, with an output from the second signal path; and wherein the main amplifier has a gain of A, the replica amplifier has a gain of A, the scaling amplifier has a gain of β, and the correction amplifier has a gain of 1/β3.
- 7. The amplifier of claim 6 wherein the phase matching element comprises:a first amplifier having a gain of 1/β; and a second amplifier having a gain of β coupled between the first amplifier and the main amplifier.
- 8. The amplifier of claim 6 wherein the combining node is a summing node.
- 9. An amplifier comprising:a first signal path having a scaling divider, a first non-inverting buffer, and a main amplifier coupled in series; a second signal path having a replica amplifier, a correction divider, and a second non-inverting buffer coupled in series; a combining node for combining an output of the first signal path with an output of the second signal; and wherein the main amplifier has a gain of A, the replica amplifier has a gain of A, the scaling divider has a gain of 1/zβ, the correction divider has a gain of 1/zβ3, the first non-inverting buffer has a gain of z, and the second non-inverting buffer has a gain of z.
- 10. The amplifier of claim 9 wherein the combining node is a summing node.
Parent Case Info
This application claims priority under 35 USC §119 (e) (1) of provisional application No. 60/356,872 filed Feb. 13, 2002.
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Non-Patent Literature Citations (1)
Entry |
Yongwang Ding, et al., “A+18dBm IIP3 LNA in 0.35μm CMOS” IEEE ISSCC Digest of Technical Papers, pp. 162-163, 2001. |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/356872 |
Feb 2002 |
US |