Constant time stroke generator

Claim 2

In combination: means for generating signals indicative of a multiple digit binary number whose value may change at successive intervals of time; means responsive to said signals for generating for each digit of said number a wave which is of a first constant level if the digit is equal to 0 and has not changed its value since the immediately preceding time interval, which is of a seconD constant level if the digit is equal to 1 and has not changed its value since the immediately preceding time interval, which is a linear transition from said first to said second level when the digit has changed its value in one sense since the immediately preceding time interval, and is a linear transition from said second to said first level when the digit has changed its value in the opposite sense since the immediately preceding time interval; and means for obtaining from said waves a sum wave comprising means for adding the waves representing the digits of the binary number with weight, in each case, proportional to the power of two represented by said digit.

Claim 3

In the combination as set forth in claim 1, said last-named means including a plurality of resistor means, each different one of said resistor means having a value such as to produce a current proportional to a different power of two in response to a voltage of given amplitude.

Claim 4

In the combination as set forth in claim 2, each said resistor means having substantially the same input impedance.

Claim 5

In the combination as set forth in claim 1, said means for generating for each digit a wave comprising: a plurality of substantially identical four terminal diode bridges, one pair of opposite terminals of each bridge being connected to terminals for positive and negative voltage sources, respectively, a third terminal of each bridge serving as an input terminal, and a separate charge storage means connected to the fourth terminal of each separate bridge.

Claim 6

In a stroke generator, in combination: means for generating a group greater than 2 of waves of the same duration and each wave having one of the following forms: a. first constant level; b. a second constant level; c. a wave which continuously increases from said first to said second level and d. a wave which continuously decreases from said second to said first level; and means for deriving from said group of waves a single sum wave comprising means for adding said waves with different weights.

Claim 7

In a stroke generator, in combination: means for generating a group greater than 2 of waves of the same duration and each wave having one of the following forms: a. first constant level; b. a second constant level; c. a wave which continuously increases from said first to said second level and d. a wave which continuously decreases from said second to said first level; and means for deriving from said group of waves a single sum wave comprising means for adding said waves with different weights.

Claim 8

In a stroke generator as set forth in claim 5, said means for adding comprising means for adding said waves, each wave with a weight proportional to a different power of two.

Claim 9

In a stroke generator, in combination: means for generating signals representing the digits of two binary numbers, each binary number capable of changing its value during successive equal time intervals, each binary number indicative of the end point of a stroke; means responsive to the signals representing the respective digits of each binary number for producing analog signals, one such signal per digit, each signal having an initial value which is its final value during the immediately preceding time interval, and having a final value equal to, or a given amount more than, or a given amount less than, said initial value depending upon whether the binary digit the analog signal represents has not changed its value, has changed from a first to a second value or has changed from its second to its first value, respectively, in each case relative to the value of the binary digit during the immediately preceding time interval; means for producing a first deflection waveform comprising means for adding the analog signals representing the first number with weights, proportional in each case, to the power of two represented by the corresponding digit; and means for producing a second deflection waveform comprising means for adding to the analog signals representing the second number with weights, proportional in each case, to the power of two represented by the corresponding digit.

Claim 10

In a stroke generator, in combination: means for generating signals representing the digits of two binary numbers, each binary number capable of changing its value during successive equal time intervals, each binary number indicative of the end point of a stroke; means responsive to the signals representing the respective digits of each binary number for producing analog signals, one such signal per digit, each signal having an initial value which is its final value during the immediately preceding time interval, and having a final value equal to, or a given amount more than, or a given amount less than, said initial value depending upon whether the binary digit the analog signal represents has not changed its value, has changed from a first to a second value or has changed from its second to its first value, respectively, in each case relative to the value of the binary digit during the immediately preceding time interval; means for producing a first deflection waveform comprising means for adding the analog signals representing the first number with weights, proportional in each case, to the power of two represented by the corresponding digit; and means for producing a second deflection waveform comprising means for adding to the analog signals representing the second number with weights, proportional in each case, to the power of two represented by the corresponding digit.