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Apparatus and methods for chopping ripple reduction in amplifiers
US2016294331A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016294331-A1 |
| Application number | US-201514675087-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 31, 2015 |
| Priority date | Mar 31, 2015 |
| Publication date | Oct 6, 2016 |
| Grant date | — |
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Abstract
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Apparatus and methods for digitally-assisted feedback offset correction are provided herein. In certain configurations, an amplifier includes amplification circuitry for providing amplification to an input signal and chopping circuitry for compensating for an input offset voltage of the amplifier. Additionally, the amplifier further includes a digitally-assisted feedback offset correction circuit, which includes a chopping ripple detection circuit, a feedback-path chopping circuit, a digital correction control circuit, and an offset correction circuit. The chopping ripple detection circuit generates a detected ripple signal based on detecting an output ripple of the amplifier. Additionally, the feedback-path chopping circuit demodulates the detected ripple signal using the amplifier's chopping clock signal. The digital correction control circuit receives the demodulated ripple signal, which the digital correction control circuit uses to control a value of a digital offset control signal that controls an amount of input offset correction provided by the offset correction circuit.
First claim
Opening claim text (preview).
1 . An amplifier comprising: amplification circuitry configured to generate an output signal based on amplifying a differential input voltage signal; chopping circuitry configured to provide chopping to the differential input voltage signal; and a feedback offset correction circuit comprising: a chopping ripple detection circuit configured to generate a detected ripple signal based on detecting a chopping ripple of the amplifier associated with the chopping; a feedback-path chopping circ…
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Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
- H03F1/26Primary
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US2016294331A1 cover?
- Apparatus and methods for digitally-assisted feedback offset correction are provided herein. In certain configurations, an amplifier includes amplification circuitry for providing amplification to an input signal and chopping circuitry for compensating for an input offset voltage of the amplifier. Additionally, the amplifier further includes a digitally-assisted feedback offset correction circu…
- Who is the assignee on this patent?
- Analog Devices Inc
- What technology area does this patent fall under?
- Primary CPC classification H03F1/26. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Oct 06 2016 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).