US4396912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for point connecting with a differential integrator dot connector circuit
Assignee: HP Inc
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Filing: 1981-08-17
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Granted: 1983-08-02
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Expires: 2001-08-17
Abstract
Abstract A novel circuit employing a differential integrator having differential inputs V 1 and V 2 provides a substantially uniformly varying output voltage representative of a straight line for connecting two display points having voltage levels V 1 and V 2 . This circuit is ideally used in the reconstruction of analog waveforms from digitally stored data for display on an oscilloscope.
Inventors
- 👤 Michael A. Pozzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:12
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G09; G09G; G09G1/00; G09G1/06; G09G1/08; G09G1/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
102 words
An apparatus to display two points having voltage levels V 1 and V 2 interconnected by a substantially uniformly varying voltage representative of a straight line, comprising: current source means for providing an output current directly proportional to the difference of its input voltages, said current source means having first and second input ports for accepting said V 1 and V 2 volts, respectively; capacitance means coupled to said first current source means for providing in response to said output current said substantially uniformly varying voltage; and a video display having an amplitude input port coupled to said substantially uniformly varying voltage.
Claim 2
Independent Claim
102 words
An apparatus to display two points having voltage levels V 1 and V 2 interconnected by a substantially uniformly varying voltage representative of a straight line, comprising: current source means for providing an output current directly proportional to the difference of its input voltages, said current source means having first and second input ports for accepting said V 1 and V 2 volts, respectively; capacitance means coupled to said first current source means for providing in response to said output current said substantially uniformly varying voltage; and a video display having an amplitude input port coupled to said substantially uniformly varying voltage.
Claim 3
Independent Claim
151 words
An apparatus to connect two display points having voltage levels V 1 and V 2 with a substantially uniformly varying voltage representative of a straight line, comprising: current source means for providing an output current directly proportional to the difference of its input voltages, said current source means having first and second input ports for accepting said V 1 and V 2 volts, respectively; capacitance means coupled to said current source means for providing in response to said output current said substantially uniformly varying voltage; a sample-and-hold circuit having its input port coupled to said capacitance means and its output port coupled to said current source means for sampling a voltage level at said capacitance means and for providing said sampled voltage as said V 1 to said first input port; and input amplifier means coupled to said second input port for providing said V 2 to said current source means.
Claim 4
Independent Claim
151 words
An apparatus to connect two display points having voltage levels V 1 and V 2 with a substantially uniformly varying voltage representative of a straight line, comprising: current source means for providing an output current directly proportional to the difference of its input voltages, said current source means having first and second input ports for accepting said V 1 and V 2 volts, respectively; capacitance means coupled to said current source means for providing in response to said output current said substantially uniformly varying voltage; a sample-and-hold circuit having its input port coupled to said capacitance means and its output port coupled to said current source means for sampling a voltage level at said capacitance means and for providing said sampled voltage as said V 1 to said first input port; and input amplifier means coupled to said second input port for providing said V 2 to said current source means.
Claim 5
Dependent Claim
27 words
The apparatus as in claim 2 wherein said input amplifier means comprises a digital-to-analog converter means for converting digital data into a voltage output V 2 .
Claim 6
Dependent Claim
35 words
The apparatus as in claim 2 or 3 further comprising a buffer amplifier coupled to said capacitance means for coupling externally said substantially uniformly varying voltage having V 1 and V 2 as end points.
Claim 7
Independent Claim
109 words
A method for displaying two points having voltage levels V 1 and V 2 interconnected by a substantially uniformly varying voltage representative of a straight line, comprising the steps of: applying said V 1 to a first input port of a current source means for providing an output current directly proportional to the difference of its input voltages; applying said V 2 to a second input port of said current source means; charging with said output current a capacitance means for providing in response to said output current said substantially uniformly varying voltage; and applying said substantially uniformly varying voltage to the amplitude input port of a video display.
Claim 8
Independent Claim
109 words
A method for displaying two points having voltage levels V 1 and V 2 interconnected by a substantially uniformly varying voltage representative of a straight line, comprising the steps of: applying said V 1 to a first input port of a current source means for providing an output current directly proportional to the difference of its input voltages; applying said V 2 to a second input port of said current source means; charging with said output current a capacitance means for providing in response to said output current said substantially uniformly varying voltage; and applying said substantially uniformly varying voltage to the amplitude input port of a video display.
Claim 9
Independent Claim
142 words
A method for connecting two display points having voltage levels V 1 and V 2 with a substantially uniformly varying voltage representative of a straight line, comprising the steps of: applying said V 1 to a first input port of a current source means for providing an output current directly proportional to the difference of its input voltages; applying said V 2 to a second input port of said current source means; charging with said output current a capacitance means for providing in response to said output current said substantially uniformly varying voltage; sampling said capacitance means at a select voltage level; coupling said sampled voltage to said first input port, said sampled voltage being said V 1 ; amplifying an applied input; and coupling said amplified applied input to said second input port, said amplified input being said V 2 .
Claim 10
Independent Claim
142 words
A method for connecting two display points having voltage levels V 1 and V 2 with a substantially uniformly varying voltage representative of a straight line, comprising the steps of: applying said V 1 to a first input port of a current source means for providing an output current directly proportional to the difference of its input voltages; applying said V 2 to a second input port of said current source means; charging with said output current a capacitance means for providing in response to said output current said substantially uniformly varying voltage; sampling said capacitance means at a select voltage level; coupling said sampled voltage to said first input port, said sampled voltage being said V 1 ; amplifying an applied input; and coupling said amplified applied input to said second input port, said amplified input being said V 2 .
Claim 11
Dependent Claim
24 words
The method as in claim 6 wherein said step of amplifying comprises converting an applied digital input to an analog voltage and amplifying same.
Claim 12
Dependent Claim
25 words
The method as in claim 6 or 7 further comprising the step of amplifying said substantially uniformly varying voltage to provide a buffered output signal.
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) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |