Exponential sweep multivibrator
OwnerStephen R. Troyinventor
Life of this patent
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Abstract
An exponential sweep multivibrator capable of extremely high-speed operation and producing an exponential output waveform. This multivibrator in addition to incorporating within the circuitry thereof a "digital" device such as a NAND gate, integrates the collector current from a controlled source transistor in a capacitor. The collector current is proportional to the output voltage of the digital gate, which in turn is proportional to the sum of the input current and a current derived from the output voltage of the multivibrator. As a result thereof an output waveshape is produced whose rate of increase is proportional to its instantaneous amplitude, which, by definition, is an exponential function of time.
Claims11
an exponential sweep multivibrator comprising a digital device having first and second inputs and an output, means electrically connected to said digital device for accepting a control voltage and directing said control voltage to said first input of said digital device, a feedback circuit electrically connected between said first input and said output of said digital device, means electrically connected to said output of said digital device for converting said digital device output voltage into a current, capacitor electrically connected to said voltage converting means, a DC source electrically connected to said voltage converting means, a voltage sensitive switching means, said switching means having at least two terminals, one of said terminals being electrically connected to said capacitor and said second input of said digital device and the other of said terminals being electrically connected to said first input of said digital device whereby said multivibrator is capable of producing an output waveshape which is an essentially exponential function with respect to time.
Dependencies are inferred from the claim text.