GB2624595A - Amplifier circuitry - Google Patents
Amplifier circuitry Download PDFInfo
- Publication number
- GB2624595A GB2624595A GB2402904.3A GB202402904A GB2624595A GB 2624595 A GB2624595 A GB 2624595A GB 202402904 A GB202402904 A GB 202402904A GB 2624595 A GB2624595 A GB 2624595A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuitry
- amplifier
- input
- amplifier circuitry
- stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000008878 coupling Effects 0.000 claims abstract 19
- 238000010168 coupling process Methods 0.000 claims abstract 19
- 238000005859 coupling reaction Methods 0.000 claims abstract 19
- 230000003190 augmentative effect Effects 0.000 claims 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
- H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
- H03F3/187—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only in integrated circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/217—Class D power amplifiers; Switching amplifiers
- H03F3/2173—Class D power amplifiers; Switching amplifiers of the bridge type
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Multimedia (AREA)
- Amplifiers (AREA)
Abstract
Integrated circuitry implementing amplifier circuitry, the integrated circuity comprising first amplifier circuitry and second amplifier circuitry, the first and second amplifier circuitry being configurable as first and second single-ended amplifiers or as a differential amplifier, wherein the first amplifier circuitry comprises: a first input stage; a first half- bridge output stage having an output coupled to a first output terminal of the integrated circuitry; a first feedback path coupling a first input of the first input stage to a first sense terminal of the first amplifier circuitry; a second feedback path coupling a second input of the first input stage to a second sense terminal of the first amplifier circuitry; and a first shunt resistor coupling the output of the first half-bridge output stage to the first feedback path,wherein the second amplifier circuitry comprises: a second input stage; and a second half-bridge output stage having an output coupled to a second output terminal of the integrated circuitry, and wherein the first amplifier circuitry further comprises a second shunt resistor coupling the second feedback path to a dedicated shunt resistor terminal of the integrated circuitry, such that the second shunt resistor is directly accessible from outside the integrated circuitry.
Claims (18)
1. Integrated circuitry implementing amplifier circuitry, the integrated circuity comprising first amplifier circuitry and second amplifier circuitry, the first and second amplifier circuitry being configurable as first and second single-ended amplifiers or as a differential amplifier, wherein the first amplifier circuitry comprises: a first input stage; a first half-bridge output stage having an output coupled to a first output terminal of the integrated circuitry; a first feedback path coupling a first input of the first input stage to a first sense terminal of the first amplifier circuitry; a second feedback path coupling a second input of the first input stage to a second sense terminal of the first amplifier circuitry; and a first shunt resistor coupling the output of the first half-bridge output stage to the first feedback path, wherein the second amplifier circuitry comprises: a second input stage; and a second half-bridge output stage having an output coupled to a second output terminal of the integrated circuitry, and wherein the first amplifier circuitry further comprises a second shunt resistor coupling the second feedback path to a dedicated shunt resistor terminal of the integrated circuitry, such that the second shunt resistor is directly accessible from outside the integrated circuitry.
2. Integrated circuitry according to claim 1 , wherein: the first amplifier circuitry comprises a first return path switch in a first return path, for selectively coupling an amplifier return terminal of the first amplifier circuitry to a ground or reference volage supply terminal of the first amplifier circuitry; and/or the second amplifier circuitry comprises a second return path switch in a second return path for selectively coupling an amplifier return terminal of the 25 second amplifier circuitry to a ground or reference volage supply terminal of the second amplifier circuitry
3. Integrated circuitry according to claim 2, wherein: the first amplifier circuitry comprises load sensing circuitry coupled to the amplifier return terminal of the first circuitry, for determining a parameter of a load coupled to the first output terminal; and/or the second amplifier circuitry comprises load sensing circuitry coupled to the amplifier return terminal of the second circuitry, for determining a parameter of a load coupled to the second output terminal.
4. Integrated circuitry according to any of the preceding claims, wherein the first amplifier circuitry comprises Class D amplifier circuitry.
5. Integrated circuitry according to any of the preceding claims, wherein the first input stage comprises pulse width modulator circuitry.
6. Integrated circuitry according to any of the preceding claims, wherein the second amplifier circuitry further comprises: a second input stage; a third feedback path coupling a first input of the second input stage to a first sense terminal of the second amplifier circuitry; a fourth feedback path coupling a second input of the second input stage to a second sense terminal of the second amplifier circuitry; a third shunt resistor coupling the output of the second half-bridge output stage to the third feedback path; and a second shunt resistor coupling the second feedback path to an amplifier return terminal of the second amplifier circuitry.
7. Integrated circuitry according to claim 6, wherein the second amplifier circuitry comprises class D amplifier circuitry.
8. Integrated circuitry according to claim 7, wherein the second input stage comprises pulse width modulator circuitry.
9. Integrated circuitry according to any of the preceding claims, wherein in operation of the integrated circuitry when configured as a differential amplifier, the first input stage is configured to supply input signals to the first half-bridge output stage and to the second half-bridge output stage.
10. Integrated circuitry according to any of the preceding claims, wherein in operation of the integrated circuitry when configured as first and second single-ended amplifiers, the first input stage is configured to supply an input signal to the first half-bridge output stage and the second input stage is configured to supply an input signal to the second half-bridge output stage.
11 . Reconfigurable amplifier circuitry comprising: a first amplifier comprising: a first input stage; a first output stage; a first feedback path coupled to a first input of the first input stage; a second feedback path coupled to a second input of the first input stage; a first resistor coupling an output node of the first output stage to the first feedback path; and a second resistor coupled between a dedicated resistor node and the second feedback path; and a second amplifier comprising: a second input stage; a second output stage; a third feedback path coupled to a first input of the second input stage; a fourth feedback path coupled to a second input of the first input stage; a third resistor coupling an output node of the second output stage to the third feedback path; and a fourth resistor coupled between an amplifier return terminal and the second feedback path; wherein the reconfigurable amplifier circuitry is operable in: a first configuration as first and second amplifiers for driving respective first and second loads coupled to the respective output nodes of the first and second output stages; and a second configuration for differentially driving a single load coupled between the respective output nodes of the first and second output stages, wherein in the second configuration the output node of the second output stage is coupled to the dedicated resistor node of the first amplifier circuitry.
12. Reconfigurable amplifier circuitry comprising: first amplifier circuitry comprising a first input stage, a first output stage and a feedback path coupling an output node of the first output stage to a first input of the first input stage, wherein the feedback path comprises a first shunt resistor; second amplifier circuitry comprising a second input stage, a second output stage and a feedback path coupling an output node of the second output stage to a first input of the second input stage, wherein the feedback path comprises a second shunt resistor; and a selectable feedback path coupling the output node of the second output stage to a second input of the first input stage, wherein: in a first configuration the reconfigurable amplifier circuitry is operable as first and second single-ended amplifiers for driving respective first and second loads, wherein in the first configuration the selectable feedback path is disabled, the first input stage is operative to supply a first input signal to the first output stage and the second input stage is operative to supply a second input signal to the second output stage; and in a second configuration the reconfigurable amplifier circuitry is operable as a differential amplifier for driving a single load, wherein in the second configuration the selectable feedback path is enabled and the first input stage is operative to supply input signals to the first and second output stages.
13. Reconfigurable amplifier according to claim 12, wherein the first amplifier circuitry comprises a selectable second feedback path between a first amplifier return terminal and the second input of the first input stage, wherein in the first configuration the 28 selectable second feedback path is enabled, and wherein in the second configuration the selectable second feedback path is disabled.
14. An integrated circuit comprising reconfigurable amplifier circuitry according to claim
11.
15. An integrated circuit comprising reconfigurable amplifier circuitry according to claim
12.
16. An integrated circuit comprising first amplifier circuitry, second amplifier circuitry and a shunt resistor associated with the first amplifier circuitry, wherein the first amplifier circuitry and the second amplifier circuitry are reconfigurable to implement either: separate first and second single-ended amplifier circuitry; or differential amplifier circuitry, and wherein the integrated circuit includes a dedicated resistor terminal to permit external access to the shunt resistor.
17. A host device comprising integrated circuitry according to any of claims 1 - 10.
18. A host device according to claim 17, wherein the host device comprises a laptop, notebook, netbook or tablet computer, a gaming device, a games console, a controller for a games console, a virtual reality (VR) or augmented reality (AR) device, a mobile telephone, a portable audio player, a portable device, an accessory device for use with a laptop, notebook, netbook or tablet computer, a gaming device, a games console a VR or AR device, a mobile telephone, a portable audio player or other portable device. 29
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US202163275994P | 2021-11-05 | 2021-11-05 | |
| US17/751,011 US20230147195A1 (en) | 2021-11-05 | 2022-05-23 | Amplifier circuitry |
| PCT/GB2022/052574 WO2023079260A1 (en) | 2021-11-05 | 2022-10-11 | Amplifier circuitry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB202402904D0 GB202402904D0 (en) | 2024-04-17 |
| GB2624595A true GB2624595A (en) | 2024-05-22 |
Family
ID=83995422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2402904.3A Pending GB2624595A (en) | 2021-11-05 | 2022-10-11 | Amplifier circuitry |
Country Status (3)
| Country | Link |
|---|---|
| GB (1) | GB2624595A (en) |
| TW (1) | TW202329618A (en) |
| WO (1) | WO2023079260A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6486643B2 (en) * | 2000-11-30 | 2002-11-26 | Analog Technologies, Inc. | High-efficiency H-bridge circuit using switched and linear stages |
| US20050024139A1 (en) * | 2003-06-09 | 2005-02-03 | Stmicroelectronics S.R.L. | Multi-channel power amplifier self-configuring to a bridge or single-ended output, particularly for audio applications |
| US20050025323A1 (en) * | 2003-06-09 | 2005-02-03 | Stmicroelectronics S.R.L. | Multi-channel power amplifier with channels independently self-configuring to a bridge or single-ended output, particularly for audio applications |
| US9806683B2 (en) * | 2015-06-18 | 2017-10-31 | Crestron Electronics, Inc. | Average current-mode feedback control of multi-channel class-D audio amplifier |
-
2022
- 2022-10-11 WO PCT/GB2022/052574 patent/WO2023079260A1/en unknown
- 2022-10-11 GB GB2402904.3A patent/GB2624595A/en active Pending
- 2022-11-03 TW TW111141928A patent/TW202329618A/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6486643B2 (en) * | 2000-11-30 | 2002-11-26 | Analog Technologies, Inc. | High-efficiency H-bridge circuit using switched and linear stages |
| US20050024139A1 (en) * | 2003-06-09 | 2005-02-03 | Stmicroelectronics S.R.L. | Multi-channel power amplifier self-configuring to a bridge or single-ended output, particularly for audio applications |
| US20050025323A1 (en) * | 2003-06-09 | 2005-02-03 | Stmicroelectronics S.R.L. | Multi-channel power amplifier with channels independently self-configuring to a bridge or single-ended output, particularly for audio applications |
| US9806683B2 (en) * | 2015-06-18 | 2017-10-31 | Crestron Electronics, Inc. | Average current-mode feedback control of multi-channel class-D audio amplifier |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202329618A (en) | 2023-07-16 |
| GB202402904D0 (en) | 2024-04-17 |
| WO2023079260A1 (en) | 2023-05-11 |
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