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US-2025317141-A1 · Oct 9, 2025 · US
Class AB common-source amplifier with constant transconductance
US10469043B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10469043-B2 |
| Application number | US-201715461667-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 17, 2017 |
| Priority date | Mar 22, 2016 |
| Publication date | Nov 5, 2019 |
| Grant date | Nov 5, 2019 |
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- Title
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- Abstract
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Abstract
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An ultrasound probe buffer is provided. The ultrasound probe buffer may include a high impedance amplifier having a common-source core stage with series-series local feedback. The high impedance amplifier may include a first MOSFET and a second MOSFET, wherein a source terminal of the first MOSFET is coupled to a source terminal of the second MOSFET.
First claim
Opening claim text (preview).
What is claimed is: 1. An ultrasound probe buffer comprising: a high impedance amplifier having a common-source core stage with series-series local feedback; wherein the high impedance amplifier comprises: a first MOSFET and a second MOSFET, wherein a drain terminal of the first MOSFET is coupled to a drain terminal of the second MOSFET; a first source degeneration resistor coupled to a source terminal of the first MOSFET; a second source degeneration resistor coupled to a source terminal of the second MOSFET; and an operational amplifier having a first input coupled to the drain terminal of the first MOSFET and the drain terminal of the second MOSFET; wherein an output of the operational amplifier is coupled via a resistor to a gate terminal of the second MOSFET. 2. The ultrasound probe buffer of claim 1 , wherein the resistance of the first source degeneration resistor is equal to the resistance of the second source degeneration resistor. 3. The ultrasound probe buffer of claim 1 , wherein the high impedance amplifier outputs an output current from the drain terminals of the first MOSFET and the second MOSFET. 4. The ultrasound probe buffer of claim 1 , wherein a gate terminal of the first MOSFET is coupled to a gate terminal of the second MOSFET via at least one capacitor. 5. The ultrasound probe buffer of claim 1 , wherein the first MOSFET is a p-type MOSFET and the second MOSFET is an n-type MOSFET. 6. The ultrasound probe buffer of claim 1 , wherein the transconductance of the ultrasound probe buffer is substantially constant.
Assignees
Inventors
Classifications
being a piezoelectric resonator (selection of piezoelectric material H10N30/00) · CPC title
involving the acoustic interface between the transducer and the tissue · CPC title
characterised by features of the ultrasound transducer · CPC title
- H03F3/3023Primary
with asymmetrical driving of the end stage · CPC title
Amplifier which being suitable for instrumentation applications · CPC title
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Frequently asked questions
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- What does patent US10469043B2 cover?
- An ultrasound probe buffer is provided. The ultrasound probe buffer may include a high impedance amplifier having a common-source core stage with series-series local feedback. The high impedance amplifier may include a first MOSFET and a second MOSFET, wherein a source terminal of the first MOSFET is coupled to a source terminal of the second MOSFET.
- Who is the assignee on this patent?
- Microchip Tech Inc
- What technology area does this patent fall under?
- Primary CPC classification H03F3/3023. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 05 2019 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).