Method and means for point connecting with a differential integrator dot connector circuit
AssigneeHewlett-Packard Company
InventorMichael A. Pozzi
Life of this patent
Estimating the term…
Abstract
A novel circuit employing a differential integrator having differential inputs V.sub.1 and V.sub.2 provides a substantially uniformly varying output voltage representative of a straight line for connecting two display points having voltage levels V.sub.1 and V.sub.2. This circuit is ideally used in the reconstruction of analog waveforms from digitally stored data for display on an oscilloscope.
Claims8
An apparatus to display two points having voltage levels V.sub.1 and V.sub.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.sub.1 and V.sub.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.
An apparatus to connect two display points having voltage levels V.sub.1 and V.sub.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.sub.1 and V.sub.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.sub.1 to said first input port;
- and
- input amplifier means coupled to said second input port for providing said V.sub.2 to said current source means.
A method for displaying two points having voltage levels V.sub.1 and V.sub.2 interconnected by a substantially uniformly varying voltage representative of a straight line, comprising the steps of:
- applying said V.sub.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.sub.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.
A method for connecting two display points having voltage levels V.sub.1 and V.sub.2 with a substantially uniformly varying voltage representative of a straight line, comprising the steps of:
- applying said V.sub.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.sub.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.sub.1 ;
- amplifying an applied input;
- and
- coupling said amplified applied input to said second input port, said amplified input being said V.sub.2.
Dependencies are inferred from the claim text.