Showing papers on "Comparator applications published in 1967"

Analog to pulse duration converter

Abstract: A capacitor is charged to the voltage level of an analogue signal to be converted. The capacitor is linearly discharged by a constant current with the resulting voltage ramp applied as one input to a comparator. The comparator output changes state when the voltage ramp passes through a reference voltage applied to the other input. The duration of the comparator output signal from the beginning of the voltage ramp to the comparator transition varies linearly with signal amplitude. Known reference voltages are converted alternately with the analogue signal. A known minimum is used to correct the reference voltage of the comparator, while a known maximum is used to correct the slope of the voltage ramp.

Laser proximity fuzing device

Abstract: Broadly, the disclosure is directed to a range-measuring detonating system comprising an air-driven scanning mirror which cooperates with fixed mirrors to project the output of a laser toward a target, the laser being modulated at a given frequency by a local oscillator and modulator circuit. Adjacent the laser is a detecting means which feeds a receiver, the receiver output being in turn delivered to a detector which feeds a phase comparator to which is also applied the output of the local oscillator. The phase comparator output is coupled to an AND circuit to which is also applied the output of the detector. When the light energy returned by a target in the vicinity of the system achieves a given phase and amplitude, the phase comparator output is gated through the AND circuit to ignite a squib, booster and warhead.