US5631584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential cross coupled peak detector
Assignee: Dallas Semiconductor Corp
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Filing: 1995-09-29
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Granted: 1997-05-20
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Expires: 2015-09-29
Abstract
Abstract The present invention overcomes the aforementioned shortcomings and deficiencies of the prior art by providing a circuit for processing an AC signal having a peak to peak envelope associated therewith, this circuit including structure for detecting the upper edge of the peak to peak envelope of the AC signal, structure for detecting the lower edge of the peak to peak envelope of the AC signal, structure for sampling the AC signal at a mid range upper point, and structure for sampling the AC signal at a mid range lower point.
Inventors
- 👤 Michael D. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:45
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/153; H03K5/1532; G; G01; G01R; G01R19/00; G01R19/04
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
195 words
A circuit for processing an AC signal having a peak to peak envelope associated therewith, the envelope having an upper edge, a lower edge and an intermediate edge therebetween, said circuit comprising: means for detecting the upper edge of the peak to peak envelope of the AC signal, said means for detecting the upper edge including a first comparator, a second comparator, and a NOR gate having two inputs, each of said two inputs of said NOR gate being connected to one of said first and second comparators; means for detecting the lower edge of the peak to peak envelope of the AC signal; means coupled to said means for detecting the upper edge for detecting the AC signal at a mid range upper point, said mid range upper point occurring between the intermediate edge and the upper edge of the peak to peak envelope, including a first output; and means coupled to said means for detecting the lower edge for detecting the AC signal at a mid range lower point, said mid range lower point occurring between the intermediate edge and the lower edge of the peak to peak envelope, including a second output.
Claim 2
Dependent Claim
195 words
A circuit for processing an AC signal having a peak to peak envelope associated therewith, the envelope having an upper edge, a lower edge and an intermediate edge therebetween, said circuit comprising: means for detecting the upper edge of the peak to peak envelope of the AC signal, said means for detecting the upper edge including a first comparator, a second comparator, and a NOR gate having two inputs, each of said two inputs of said NOR gate being connected to one of said first and second comparators; means for detecting the lower edge of the peak to peak envelope of the AC signal; means coupled to said means for detecting the upper edge for detecting the AC signal at a mid range upper point, said mid range upper point occurring between the intermediate edge and the upper edge of the peak to peak envelope, including a first output; and means coupled to said means for detecting the lower edge for detecting the AC signal at a mid range lower point, said mid range lower point occurring between the intermediate edge and the lower edge of the peak to peak envelope, including a second output.
Claim 3
Dependent Claim
55 words
A circuit as recited in claim 1, wherein said means for detecting the lower edge of the peak to peak envelope includes a third comparator, a fourth comparator, and an OR gate having two inverted inputs, each of said inverted inputs of said OR gate is connected to one of said third and fourth comparators.
Claim 4
Dependent Claim
37 words
A circuit as recited in claim 2, further comprising at least one voltage divider coupled between said means for detecting the upper edge and said means for detecting the AC signal at a mid range upper point.
Claim 5
Dependent Claim
70 words
A circuit as recited in claim 2, further comprising a first and a second voltage divider, said first voltage divider coupled between said means for detecting the upper edge and said means for detecting the AC signal at a mid range upper point, said second voltage divider coupled between said means for detecting the lower edge and said means for detecting the AC signal at a mid range lower point.
Claim 6
Dependent Claim
30 words
A circuit as recited in claim 4, wherein said means for detecting the AC signal at a mid range upper point includes a comparator coupled to said first voltage divider.
Claim 7
Dependent Claim
30 words
A circuit as recited in claim 4, wherein said means for detecting the AC signal at a mid range lower point includes a comparator coupled to said second voltage divider.
Claim 8
Dependent Claim
192 words
A circuit for processing an AC signal having a peak to peak envelope associated therewith, the envelope having an upper edge, a lower edge and an intermediate edge therebetween, said circuit comprising: means for detecting said upper edge of peak to peak envelope of the AC signal; means for detecting said lower edge of said peak to peak envelope of the AC signal, said means for detecting said lower edge comprises a first and a second comparator, and an OR gate having two inverted inputs, each of which two inverted inputs is connected to one of said first and second comparators; means coupled to said means for detecting the upper edge for detecting the AC signal at a mid range upper point, said mid range upper point occurring between the intermediate edge and the upper edge of the peak to peak envelope, including a first output; and means coupled to said means for detecting the lower edge for sampling the AC signal at a mid range lower point, said mid range lower point occurring between the intermediate edge and the lower edge of the peak to peak envelope, including a second output.
Claim 9
Dependent Claim
192 words
A circuit for processing an AC signal having a peak to peak envelope associated therewith, the envelope having an upper edge, a lower edge and an intermediate edge therebetween, said circuit comprising: means for detecting said upper edge of peak to peak envelope of the AC signal; means for detecting said lower edge of said peak to peak envelope of the AC signal, said means for detecting said lower edge comprises a first and a second comparator, and an OR gate having two inverted inputs, each of which two inverted inputs is connected to one of said first and second comparators; means coupled to said means for detecting the upper edge for detecting the AC signal at a mid range upper point, said mid range upper point occurring between the intermediate edge and the upper edge of the peak to peak envelope, including a first output; and means coupled to said means for detecting the lower edge for sampling the AC signal at a mid range lower point, said mid range lower point occurring between the intermediate edge and the lower edge of the peak to peak envelope, including a second output.
Claim 10
Dependent Claim
57 words
A circuit as recited in claim 7, wherein said means for detecting the upper edge of the peak to peak enveloper of the AC signal includes a third comparator, a fourth comparator, and a NOR gate having two inputs, each of said inputs of said NOR gate being connected to one of said third and fourth comparators.
Claim 11
Dependent Claim
37 words
A circuit as recited in claim 7, further comprising at least one voltage divider coupled between said means for detecting the upper edge and said means for detecting the AC signal at a mid range upper point.
Claim 12
Dependent Claim
70 words
A circuit as recited in claim 7, further comprising a first and a second voltage divider, said first voltage divider coupled between said means for detecting the upper edge and said means for detecting the AC signal at a mid range upper point, said second voltage divider coupled between said means for detecting the lower edge and said means for detecting the AC signal at a mid range lower point.
Claim 13
Dependent Claim
192 words
A circuit for processing an AC signal having a peak to peak envelope associated therewith, said envelope having an upper edge, a lower edge and an intermediate edge therebetween, said circuit comprising: a first detector for detecting the upper edge of the peak to peak envelope of the AC signal, said means for detecting the upper edge including a first comparator, a second comparator, and a NOR gate having two inputs, each of said two inputs of said NOR gate being connected to one of said first and second comparators; second detector for detecting the lower edge of the peak to peak envelope of the AC signal; third detector coupled to said first detector for detecting the AC signal at a mid range upper point, said mid range upper point occurring between the intermediate edge and the upper edge of the peak to peak envelope, including a first output; and fourth detector coupled to said second detector for detecting the AC signal at a mid range lower point, said mid range lower point occurring between the intermediate edge and the lower edge of the peak to peak envelope, including a second output.
Claim 14
Dependent Claim
192 words
A circuit for processing an AC signal having a peak to peak envelope associated therewith, said envelope having an upper edge, a lower edge and an intermediate edge therebetween, said circuit comprising: a first detector for detecting the upper edge of the peak to peak envelope of the AC signal, said means for detecting the upper edge including a first comparator, a second comparator, and a NOR gate having two inputs, each of said two inputs of said NOR gate being connected to one of said first and second comparators; second detector for detecting the lower edge of the peak to peak envelope of the AC signal; third detector coupled to said first detector for detecting the AC signal at a mid range upper point, said mid range upper point occurring between the intermediate edge and the upper edge of the peak to peak envelope, including a first output; and fourth detector coupled to said second detector for detecting the AC signal at a mid range lower point, said mid range lower point occurring between the intermediate edge and the lower edge of the peak to peak envelope, including a second output.
Claim 15
Dependent Claim
42 words
A circuit as recited in claim 11, wherein said second detector includes a third comparator, a fourth comparator, and an OR gate having two inverted inputs, each of said two inverted inputs being connected to one of said third and fourth comparators.
Claim 16
Dependent Claim
23 words
A circuit as recited in claim 11, further comprising at least one voltage divider coupled between said first detector and said third detector.
Claim 17
Dependent Claim
42 words
A circuit as recited in claim 11, further comprising a first and second voltage divider, said first voltage divider coupled between said first detector and said third detector, and said second voltage divider coupled between said second detector and said fourth detector.
Claim 18
Dependent Claim
20 words
A circuit as recited in claim 14, wherein said third detector includes a comparator coupled to said first voltage divider.
Claim 19
Dependent Claim
20 words
A circuit as recited in claim 14, wherein said fourth detector includes a comparator coupled to said second voltage divider.
References Cited (Backward Citations)
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