comparator

I want to use an off-the-shelf LPWAN radio product -- which has mesh networking capability and features an embedded microcontroller -- to sample a 12V battery's voltage. I don't want to do it often, so I'll configure the radio's interface to do synchronized sleep routines to wake it up and...

Hi, I’ve designed the window comparator shown in the images. However, when the input crosses the upper threshold, the output still gives me two pulses instead of staying at logic LOW. There are no problems between the thresholds or below the lower threshold. Does anyone know what might be...

How can I add components like 74LS47, 74LS90 etc to LTSpice to simulate a circuit schematic I have done in KiCad?

When S1 is closed, it connects to the main 3V supply. However, when this happens, the piezo element starts buzzing loudly—even though the MOSFET gate remains closed. Why is this happening? Interestingly, when a 1k resistor is placed in series with the inductor (not the 32Ω resistor in the...

I am trying to trigger a 555 timer using a daylight detector. For daylight detector I planned using a comparator with a potentiometer and a photoresistor. I will be comparing the voltage difference and comparator would turn on or off depending on the amount of light photoresistor gets. The...

This circuit is a DCC (model rail) controller combined with a Railcom detector circuit. The reference circuit for the detector is published by the NRMA under document S-9.3.2. this circuit uses an LM393. However, the LM393 would be at its limit as it needs to decode 250kbs serial and its...

i want to design a circuit that limits the current range to provide protection against high current. I want to use a Schmitt trigger in this design. How can I do this? For example, I want to provide protection between 2 amperes and 15 amperes. When the current falls below 2 A, the circuit should...

I was going through the comparator topic and realised that it merely compares the input and the reference voltage. Is it necessary to use resistors along with the inputs in such a circuit? I cannot find any effect of these resistors on the circuit or the output yet it seems to be an elementary...

beginner here, i imported a spice file into ltspice but in the datasheet it says its 8 pins but in ltspice its 5 pin, did i do something wrong or am i missing something

I tested a comparator MAX40025 using the universal board and discrete components. The blue curve is one input which is a short pulse, the pulse width is less than 50ns. The green curve is another input which I set to be a constant voltage(the threshold). This constant voltage came from a...

I'm trying to build a simple PWM modulator to convert the analog Audio signal into an PWM waveform, the triangle wave generator works fine and i have used an AC sine wave as an audio input, with an DC offset to match with the Triangle wave reference, but couldn't get the comparator circuit into...

Hello, I would like to use comparator MAX40025A from Analog Devices. In the datasheet, it mentions that the input common range is from 1.5V to VDD + 0.1V which I don't understand the meaning. Does it mean both the input should be in this range, or the average of two inputs should be in this...

Hi, I need to create a square wave oscillator with variable frequency upto 200 MHz and (optionally) variable duty cycle. I've got several components for this: a comparator AD8611, an operational amplifiers AD8009 and AD8055. I tried mutiple circuits, but it didn't help. Could someone please...

I want to use a current sensor IC (like the AC712), but a Chinese one CC6903-10A because it works with 3.3V. There is a circuit in the ACS712 datasheet (page 12) which also appears in the CC6903 datasheet (page 5, middle/bottom right) that is meant to latch when a high current occurs. Now, Vout...

I have build a differential amplifier comparator and it works fine except that instead of switching voltage between zero and 5v, it toggles it between 3.5v and 5v. So, I would like to know if there's a way to make it switch between 0-5v. The schematic is as follows

Dear Team, I need some clarifications for a non-inverting comparator design. I am using TLV7031 from TI.The circuit configuration is given as shown. In the datasheet it is given as " When VIN is low, the output is also low. For the output to switch from low to high, VIN must rise to VIN1 ". This...

Here's a circuit i've designed for measuring approximate current flowing through a mosfet. I have a uC that has no ADC, it only has a comparator and an internal bandgap reference voltage. So i can't just connect the drain to an ADC input and divide the voltage by Rmosfet. The line marked "PWM"...

Dear Team, Do we need to use pull up resistor when designing a Window comparator using a comparator IC with push pull output(like TLV1805 ). Regards HARI

I have designed a low battery detector circuit using low power comparator MCP6541 for a 4.2V Li-ion battery. This circuit checks whether the battery voltage if the battery voltage is lower than 3.5V then it will glow LED. Check the circuit below. The circuit is working properly but the...

Hello all, i am trying to get a comparator working with Hysteresis. A 500mV is the target between Vlth 2v and Vhth 2v5. Can somebody please help me with the Hysteresis part with an explanation for the attached LTSpice simulation.