If the comparator circuit
generates two consecutive high outputs, the Hall switch output will be low; if the circuit produces two consecutive low outputs, the switch output will be high.
Current comparator circuit
finds application in a wide variety of applications like nonlinear current mode signal processing and analog to digital converters (ADCs).
. Among different architectures in literature we chose the architecture of a static comparator .
A basic TIQ Comparator circuit
consists of two cascaded CMOS inverters, as shown Figure 2 (YOO et al., 2003).
Implementation of adjusting the hysteresis threshold must involve extra effort to design the comparator circuit
with fast online tuning capability of the hysteresis threshold.
. The comparator is a three-stage single-ended differential amplifier.
The rectified output at capacitor [C.sub.2] indicates the voltage level of the received signal, and this voltage is compared with the reference voltage in the comparator circuit
to determine the digital logic level of the received signal.
The comparator circuit
; the part of the circuit that analyses a rectified output voltage coming from the filter circuit ,giving an output voltage of its own if the rectified voltage is correct.
The unit integrates a 48-bit programmable carrier numerically controlled oscillator, a high speed 14-hit digital-to-analog converter and a comparator circuit
for square-wave generation into a single 48-pin LQFP package, and is suitable for use in point-to-point microwave systems, wireless local loop, LMDS, MMDS, satellite terminals, communications instrumentation, cable modems, NTSC/PAL video systems and last-mile wireless applications.
Depending on the output of the comparator circuit
, the control valve proportionally opens or closes the valve until the output voltage is equal to the setpoint voltage, indicating that the desired mass flow level has been reached.
This is detected in a comparator circuit
and causes the alarm.
The other shortcoming is related with design of comparator circuit
due to necessity of two-pole supply source for comparator.