Circuit that deciphers between AC and DC input signals
US-9410993-B2 · Aug 9, 2016 · US
Absence of voltage detector
US12416651B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12416651-B2 |
| Application number | US-202418669722-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 21, 2024 |
| Priority date | Feb 10, 2017 |
| Publication date | Sep 16, 2025 |
| Grant date | Sep 16, 2025 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An absence of voltage indicator has an isolation circuit, an FM modulator attached to the isolation circuit, a reference oscillator, and a mixer attached to the reference oscillator and the FM modulator, wherein the output of the mixer is the difference of the two signals. In one embodiment, the FM modulator includes a variable capacitor which varies in response to a voltage in parallel to a fixed capacitor and an inductor in parallel to the capacitors.
First claim
Opening claim text (preview).
The invention claimed is: 1. An isolation system for voltage detection circuitry comprising: a first circuit having a first high value resistance in series with a TVS diode in series with a second high value resistor a second circuit in parallel with the TVS diode having a third high value resistance in series with a varactor In series with a fourth high value resistance; a third circuit in parallel with the varactor having a first high value capacitance in series with the voltage detection circuitry in series with a second high value capacitance, and circuitry connected to the system capable of measuring a decay time and determining a state of connection based upon the decay time.
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Classifications
Testing of circuits in sensor or actuator systems (testing of apparatus for measuring electric or magnetic variables G01R35/00; testing of indicating or recording apparatus G01D; in airbag systems B60R21/0173; checking gas analysers G01N33/007; monitoring or fail-safe circuits for electromagnets H01F7/1844) · CPC title
using conversion of DC into AC, e.g. with choppers · CPC title
Measuring voltage only · CPC title
using capacitive devices · CPC title
Measuring arrangements for voltage not covered by other subgroups of G01R15/14 · CPC title
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- What does patent US12416651B2 cover?
- An absence of voltage indicator has an isolation circuit, an FM modulator attached to the isolation circuit, a reference oscillator, and a mixer attached to the reference oscillator and the FM modulator, wherein the output of the mixer is the difference of the two signals. In one embodiment, the FM modulator includes a variable capacitor which varies in response to a voltage in parallel to a fi…
- Who is the assignee on this patent?
- Panduit Corp
- What technology area does this patent fall under?
- Primary CPC classification G01R19/155. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 16 2025 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).