Comparator applications

About: Comparator applications is a research topic. Over the lifetime, 2518 publications have been published within this topic receiving 26639 citations.

Inexpensive motion control using DC motors

Abstract: Disclosed herein is a motion monitoring system for monitoring movement of a brush-type DC motor. The system includes an electrical comparator having first and second differential inputs. A current detector is connected to provide a drive current signal to the first differential input of the comparator. A low-pass filter is connected to provide an averaged drive current signal to the second differential input of the comparator. When a drive current is applied to the motor, the comparator produces a stream of binary logic-level pulses corresponding to motor movement. The pulses can be used to determine motor position and velocity.

Switching Regulator Capable of Compensating Output Errors

Abstract: A switching regulator includes a power stage, an output capacitor, a first reference voltage generator, a comparator, a constant-time trigger, an error amplifier, and an operator. The power stage includes a first switch, a second switch, and an output inductor. The comparator is coupled to the output inductor and the operator for receiving an output voltage and a compensation reference voltage. The error amplifier is coupled to the output inductor and the reference voltage generator. The constant-time trigger is coupled to the comparator and the power stage. The operator is coupled to the reference voltage generator and the error amplifier.

CMOS voltage comparator with internal hysteresis

Abstract: A CMOS voltage comparator with internal positive current feedback to achieve a predetermined hysteresis. The voltage level at which the switching occurs is precisely settable. Hysteresis is introduced such that when the set voltage level is exceeded, the output switches quickly and will remain in that state until the input voltage drops by a predetermined hysteresis voltage.

Adaptive loop response in switch-mode power supply controllers

Abstract: The output terminal of an error amplifier ( 32 ) is coupled to the inverting input of a comparator circuit ( 34 ). Additionally, a clamp circuit is coupled between the output terminal of the error amplifier ( 32 ) and circuitry connected to the non-inverting input of the comparator circuit ( 34 ), to clamp the voltage there between to a predetermined voltage level. This circuit arrangement provides improved controller closed loop response that is adaptive to the power supply ( 10 ) output voltage.

Extended range radiation dose-rate monitor

Abstract: An extended range dose-rate monitor is provided which utilizes the pulse pileup phenomenon that occurs in conventional counting systems to alter the dynamic response of the system to extend the dose-rate counting range. The current pulses from a solid-state detector generated by radiation events are amplified and shaped prior to applying the pulses to the input of a comparator. The comparator generates one logic pulse for each input pulse which exceeds the comparator reference threshold. These pulses are integrated and applied to a meter calibrated to indicate the measured dose-rate in response to the integrator output. A portion of the output signal from the integrator is fed back to vary the comparator reference threshold in proportion to the output count rate to extend the sensitive dynamic detection range by delaying the asymptotic approach of the integrator output toward full scale as measured by the meter.