US5045732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polygon circuit
Assignee: Mitsubishi Electric Corp
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Filing: 1990-02-27
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Granted: 1991-09-03
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Expires: 2010-02-27
Abstract
Abstract In a polygon circuit for input signal level compression in a signal processing circuit in, for example, a color television camera or the like, a first current proportional to the difference between an input signal voltage Vin and a reference voltage Vref is provided, and a clip circuit clips the input signal voltage Vin at a break-point setting voltage Va. A second current proportional to the difference between the output voltage of said clip circuit and the break-point setting voltage is produced, and addition or subtraction is performed on the first current and the second current to output a voltage signal proportional to the sum or the difference.
Inventors
- 👤 Hiroaki Sugiura
- 👤 Hiroyuki Takenaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:51
CPC Classifications
H; H03; H03G; H03G7/00; H03G7/06; G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/22; G06; G06G; G06G7/00; G06G7/12; G06G7/26; G06G7/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
A polygon circuit comprising: means for producing a first current proportional to the difference between an input signal voltage Vin and a reference voltage Vref; a clip circuit for clipping said input signal voltage Vin at a break-point setting voltage Va; means for producing a second current proportional to the difference between the output voltage of said clip circuit and said break-point setting voltage; and means for performing addition or subtraction on said first current and said second current to output a voltage signal proportional to the sum or the difference.
Claim 2
Dependent Claim
91 words
A polygon circuit comprising: means for producing a first current proportional to the difference between an input signal voltage Vin and a reference voltage Vref; a clip circuit for clipping said input signal voltage Vin at a break-point setting voltage Va; means for producing a second current proportional to the difference between the output voltage of said clip circuit and said break-point setting voltage; and means for performing addition or subtraction on said first current and said second current to output a voltage signal proportional to the sum or the difference.
Claim 3
Dependent Claim
161 words
An polygon circuit comprising: means for producing a first current proportional to the difference between an input signal voltage and a reference voltage; a first clip circuit for clipping said input signal voltage at a first break-point setting voltage; means for obtaining a second current proportional to the difference between the output voltage of said first clip circuit and said first break-point setting voltage; a second clip circuit for clipping said input signal voltage at a second break-point setting voltage; means for obtaining a third current proportional to the difference between the output voltage of said second clip circuit and said second break-point setting voltage; a first summing/differentiating means for performing addition or subtraction between said second current and said third current; a second summing/differentiating means for performing addition or subtraction between the output current of said first summing/differentiating means and said first current; and means for outputting a signal voltage proportional to the output current of said second summing/differentiating means.
Claim 4
Dependent Claim
161 words
An polygon circuit comprising: means for producing a first current proportional to the difference between an input signal voltage and a reference voltage; a first clip circuit for clipping said input signal voltage at a first break-point setting voltage; means for obtaining a second current proportional to the difference between the output voltage of said first clip circuit and said first break-point setting voltage; a second clip circuit for clipping said input signal voltage at a second break-point setting voltage; means for obtaining a third current proportional to the difference between the output voltage of said second clip circuit and said second break-point setting voltage; a first summing/differentiating means for performing addition or subtraction between said second current and said third current; a second summing/differentiating means for performing addition or subtraction between the output current of said first summing/differentiating means and said first current; and means for outputting a signal voltage proportional to the output current of said second summing/differentiating means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-02 | 1995-03-04 | 1995-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-02 | 1999-03-04 | 1999-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-02 | 2003-03-04 | 2003-09-03 | $7700.00 | Window Closed / Lapsed |