Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
A function generator, comprising in combination: a primary differential amplifier having first and second input terminals and a feedback loop from an output terminal to the second of the input terminals; a first gain resistor also connected to the second input terminal and to a reference potential; a plurality of additional gain resistors interconnected to the second of the input terminals; a voltage ladder network providing control voltages in number equal to the plurality of additional gain resistors; and a plurality of secondary differential amplifiers equal in number to said additional gain resistors individually connected to one of said resistors and one of the control voltages to vary the gain of said primary differential amplifier.
Claim 2
Dependent Claim
115 words
A function generator, comprising in combination: a primary differential amplifier having first and second input terminals and a feedback loop from an output terminal to the second of the input terminals; a first gain resistor also connected to the second input terminal and to a reference potential; a plurality of additional gain resistors interconnected to the second of the input terminals; a voltage ladder network providing control voltages in number equal to the plurality of additional gain resistors; and a plurality of secondary differential amplifiers equal in number to said additional gain resistors individually connected to one of said resistors and one of the control voltages to vary the gain of said primary differential amplifier.
Claim 3
Dependent Claim
37 words
A function generator as set forth in claim 1 wherein each of the secondary differential amplifiers includes first and second input terminals and a feedback loop from an output terminal to the second of the input terminals.
Claim 4
Dependent Claim
26 words
A function generator as set forth in claim 1 wherein said voltage ladder network generates sequentially higher control voltages to each of the secondary differential amplifiers.
Claim 5
Dependent Claim
26 words
A function generator as set forth in claim 3 wherein the control voltages are set at desired breakpoints for the output of said primary differential amplifier.
Claim 6
Dependent Claim
27 words
A function generator as set forth in claim 1 wherein said feedback loop includes a feedback resistor connected from the output terminal to the second input terminal.
Claim 7
Dependent Claim
40 words
A function generator as set forth in claim 5 wherein the gain of the primary differential amplifier varies with the ratio of the feedback resistor to the gain resistors clamped by conducting secondary differential amplifiers to said voltage ladder network.
Claim 8
Dependent Claim
28 words
A function generator as set forth in claim 1 wherein the number of secondary differential amplifiers establishes the breakpoints in the output waveform from said primary differential amplifier.
Claim 9
Dependent Claim
150 words
A function generator, comprising in combination: a primary differential amplifier having first and second input terminals and a feedback resistor connected from the output terminal to the second input terminal; a first gain resistor also connected to the second input terminal and to a reference potential; a plurality of additional gain resistors interconnected to the second of the input terminals; a voltage ladder network providing control voltages at desired breakpoints in the output of said primary differential amplifier and in number equal to the plurality of additional gain resistors; and a plurality of secondary differential amplifiers equal in number to said additional gain resistors to individually connect one of said resistors to one of the control voltages to vary the gain of said primary differential amplifier in accordance with the ratio of the feedback resistor to the gain resistors clamped by conducting secondary differential amplifiers to said voltage ladder network.
Claim 10
Dependent Claim
150 words
A function generator, comprising in combination: a primary differential amplifier having first and second input terminals and a feedback resistor connected from the output terminal to the second input terminal; a first gain resistor also connected to the second input terminal and to a reference potential; a plurality of additional gain resistors interconnected to the second of the input terminals; a voltage ladder network providing control voltages at desired breakpoints in the output of said primary differential amplifier and in number equal to the plurality of additional gain resistors; and a plurality of secondary differential amplifiers equal in number to said additional gain resistors to individually connect one of said resistors to one of the control voltages to vary the gain of said primary differential amplifier in accordance with the ratio of the feedback resistor to the gain resistors clamped by conducting secondary differential amplifiers to said voltage ladder network.