Amplifier circuit
US-2024154634-A1 · May 9, 2024 · US
Doherty amplifier with efficiency optimization
US9444420B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9444420-B2 |
| Application number | US-201214116994-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 29, 2012 |
| Priority date | Jun 30, 2011 |
| Publication date | Sep 13, 2016 |
| Grant date | Sep 13, 2016 |
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Abstract
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An amplifier comprises a main-amplifier circuit, an auxiliary-amplifier circuit and a signal-generating device. Output terminals of the main-amplifier circuit and of the auxiliary-amplifier circuit are connected according to the Doherty principle. The signal-generating device is configured to generate directly a main-amplifier signal as an input signal of the main-amplifier circuit and an auxiliary-amplifier signal as an input signal of the auxiliary-amplifier circuit.
First claim
Opening claim text (preview).
The invention claimed is: 1. An amplifier comprising: a main-amplifier circuit; an auxiliary-amplifier circuit, whereas the output terminals of the main-amplifier circuit and the auxiliary-amplifier circuit are connected according to the Doherty principle; a signal-generating device configured to generate directly a main-amplifier signal as an input signal of the main-amplifier circuit and an auxiliary-amplifier signal as an input signal of the auxiliary-amplifier circuit; and a control device configured to control the signal-generating device, wherein the control device is configured to determine a threshold value on the basis of the signal to be amplified in order to determine the main-amplifier signal and the auxiliary-amplifier signal, and wherein the control device is configured to adjust the threshold value in an efficiency-optimizing manner on the basis of a statistical amplitude distribution of the signal to be amplified. 2. The amplifier according to claim 1 , wherein the main-amplifier signal corresponds to a signal to be amplified, and wherein the auxiliary-amplifier signal corresponds to the signal peaks of the signal to be amplified. 3. The amplifier according to claim 1 , wherein the main-amplifier signal and the auxiliary-amplifier signal are phase shifted. 4. The amplifier according to claim 1 , wherein the signal-generating device is configured to generate the main-amplifier signal and the auxiliary-amplifier signal by modulation and/or from digital data to be transmitted. 5. The amplifier according to claim 1 , wherein the signal-generating device includes a modulator or control transmitter. 6. The amplifier according to claim 1 , wherein the amplifier further contains a bias-current generating device, and wherein the bias-current generating device is configured to generate bias-currents of the main-amplifier circuit and the auxiliary-amplifier circuit. 7. The amplifier according to claim 6 , wherein the control device is configured to control the bias-current generating device. 8. The amplifier according to claim 6 , wherein the control device is configured to adjust the bias-currents of the main-amplifier circuit and the auxiliary-amplifier circuit in an efficiency-optimizing manner on the basis of statistical advance information relating to the signal to be amplified. 9. The amplifier according to claim 1 , wherein the control device is configured to maximize a mean efficiency over a totality of transmission symbols to be transmitted. 10. The amplifier according to claim 3 , wherein the main-amplifier signal and the auxiliary-amplifier signal are phase shifted by 90°.
Assignees
Inventors
Classifications
- H03F3/68Primary
Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics {(power amplifiers using a combination of several semiconductor amplifiers H03F3/211; combinations of amplifiers using coupling networks with distributed constants H03F3/602)} · CPC title
- H03F1/0288Primary
using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers · CPC title
Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation · CPC title
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- What does patent US9444420B2 cover?
- An amplifier comprises a main-amplifier circuit, an auxiliary-amplifier circuit and a signal-generating device. Output terminals of the main-amplifier circuit and of the auxiliary-amplifier circuit are connected according to the Doherty principle. The signal-generating device is configured to generate directly a main-amplifier signal as an input signal of the main-amplifier circuit and an auxil…
- Who is the assignee on this patent?
- Dalisda Uwe, Mühlbacher Peter, Rohde & Schwarz
- What technology area does this patent fall under?
- Primary CPC classification H03F3/68. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 13 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).