Push-pull rf power amplifier circuit and push-pull rf power amplifier
US-2024429886-A1 · Dec 26, 2024 · US
Amplifier circuit
US2023026142A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023026142-A1 |
| Application number | US-202217960884-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 6, 2022 |
| Priority date | Jun 8, 2020 |
| Publication date | Jan 26, 2023 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
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An amplifier circuit is configured in such a way that the amplifier circuit includes: a first amplifier to amplify a signal to be amplified; an output matching circuit through which the signal amplified by the first amplifier propagates; and a second amplifier to amplify the signal which has propagated through the output matching circuit, and the output matching circuit is a lumped constant circuit including multiple lumped constant elements, and, by using the multiple lumped constant elements, transforms the impedance seen on the second amplifier side from the first amplifier when the output power of the second amplifier is lower than saturation electric power, to impedance higher than impedance seen on the second amplifier side from the first amplifier when the output power of the second amplifier is equal to the saturation electric power.
First claim
Opening claim text (preview).
1 . An amplifier circuit comprising: a first amplifier to amplify a signal to be amplified; an output matching circuit through which the signal amplified by the first amplifier propagates; and a second amplifier to amplify the signal which has propagated through the output matching circuit, wherein the output matching circuit is a lumped constant circuit including multiple lumped constant elements, and, by using the multiple lumped constant elements, transforms impedance seen on a side of the second amplifier from the first amplifier when output power of the second amplifier is lower than saturation electric power, to impedance higher than impedance seen on the side of the second amplifier from the first amplifier when the output power of the second amplifier is equal to the saturation electric power. 2 . The amplifier circuit according to claim 1 , wherein the output matching circuit, by using the multiple lumped constant elements, transforms the impedance seen on the side of the second amplifier from the first amplifier when the output power of the second amplifier is lower than the saturation electric power in such a way that an absolute value of a sum total of a transmission phase of a parasitic component included in the first amplifier, a transmission phase of the output matching circuit and an input reflection phase of the second amplifier is equal to or less than a threshold. 3 . The amplifier circuit according to claim 2 , wherein the output matching circuit includes: as the multiple lumped constant elements, a first inductor having one end connected to an output side of the first amplifier; a second inductor having one end connected to the other end of the first inductor, and having the other end grounded; and a capacitor having one end connected to each of the following ends: the other end of the first inductor, and the one end of the second inductor, and having the other end connected to an input side of the second amplifier. 4 . The amplifier circuit according to claim 2 , wherein the threshold is 45 degrees, and, the output matching circuit, by using the multiple lumped constant elements, transforms the impedance seen on the side of the second amplifier from the first amplifier when the output power of the second amplifier is lower than the saturation electric power in such a way that the absolute value of the sum total is equal to or less than 45 degrees. 5 . The amplifier circuit according to claim 2 , wherein the threshold is 0 degrees, and, the output matching circuit, by using the multiple lumped constant elements, transforms the impedance seen on the side of the second amplifier from the first amplifier when the output power of the second amplifier is lower than the saturation electric power in such a way that the absolute value of the sum total is equal to 0 degrees. 6 . The amplifier circuit according to claim 1 , wherein the second amplifier is a Doherty amplifier. 7 . The amplifier circuit according to claim 1 , wherein the second amplifier is an envelope tracking amplifier.
Assignees
Inventors
Classifications
A non-specified detector of a signal envelope being used in an amplifying circuit · CPC title
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
- H03F1/565Primary
using inductive elements · CPC title
A matching circuit being used as coupling element between two amplifying stages · CPC title
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
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- What does patent US2023026142A1 cover?
- An amplifier circuit is configured in such a way that the amplifier circuit includes: a first amplifier to amplify a signal to be amplified; an output matching circuit through which the signal amplified by the first amplifier propagates; and a second amplifier to amplify the signal which has propagated through the output matching circuit, and the output matching circuit is a lumped constant cir…
- Who is the assignee on this patent?
- Mitsubishi Electric Corp
- What technology area does this patent fall under?
- Primary CPC classification H03F1/565. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jan 26 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).