Electronic device
US-2015364805-A1 · Dec 17, 2015 · US
Exponential ROM table tuning using trim for frequency agile analog filters
US9306531B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9306531-B2 |
| Application number | US-201414199839-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 6, 2014 |
| Priority date | Mar 6, 2014 |
| Publication date | Apr 5, 2016 |
| Grant date | Apr 5, 2016 |
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Abstract
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A tunable and trimmable analog filter may include a tunable analog filter and a trimming circuit. The tunable analog filter may set the frequency of a characteristic of the tunable analog filter based on a digital tuning signal that is indicative of a desired frequency of the characteristic. However, the tunable analog filter may contain components having values that deviate from specified values due to var during manufacture of the tunable analog filter. The value deviations can cause the frequency of the characteristic not to precisely match the frequency indicated by the digital tuning signal. The trimming circuit may include a non-volatile memory that contains data. The trimming circuit may receive tuning information indicative of a desired frequency for the characteristic of the tunable analog filter. The trimming circuit may generate the digital tuning signal by trimming the tuning information to compensate for the deviations in component value and by using the data contained within the non-volatile digital memory.
First claim
Opening claim text (preview).
The invention claimed is: 1. A tunable and trimmable analog filter comprising: a tunable analog filter that: sets the frequency of a characteristic of the tunable analog filter based on a digital tuning signal that is indicative of a desired frequency of the characteristic; and contains components having values that deviate from specified values due to variations during manufacture of the tunable analog filter, the value deviations causing the frequency of the characteristic…
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Classifications
Electricity · mapped topic
- H03H7/0138Primary
Electricity · mapped topic
- H03H7/06Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9306531B2 cover?
- A tunable and trimmable analog filter may include a tunable analog filter and a trimming circuit. The tunable analog filter may set the frequency of a characteristic of the tunable analog filter based on a digital tuning signal that is indicative of a desired frequency of the characteristic. However, the tunable analog filter may contain components having values that deviate from specified valu…
- Who is the assignee on this patent?
- Linear Techn Inc
- What technology area does this patent fall under?
- Primary CPC classification H03H7/0138. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 05 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).