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Non Inverting Comparator

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24 Threads found on edaboard.com: Non Inverting Comparator
Use a thermistor (PTC) as temperature sensor and an opamp as comparator (with a potentiometer on the non-inverting input as reference voltage). Once temperature exceeds a value set with the potentiometer, the opamp's output will go low and can switch off a relay that is connected to your lamp. Simple circuit, $2 worth of components.
Depending on timing and accuracy constraints, one simple way to do this is using a peak detector-basically a resistor/diode/cap. The basic operation is as follows: using a voltage comparator, the non-inverting input gets the signal through an RC with a diode across the R, and the inverting input gets an attenuated version (...)
Hi, I am trying to use op-amp MCP 6004 as a comparator. I am having 0.6V on the non-inverting input. The inverting input is connected to ground by a 5K resistor. So ideally I should see the output go to positive rail because the non-inverting input is greater than the (...)
Dear All, Pls help me out,Whenever i am connecting Sinewave(5Vp-p\50Hz) generated using XR2206 to TL074 non-inverting Terminal used as an difference op-amp,the voltage of sinewave gets reduced to 1.68Vp-p & simultaneously Op-Amp +15 V drops to 4.68V. I have connected +15 V & -15 V to the Op-amp :smile: Is 680E connected for current limit a
The premise that V(inverting)=V(non-inverting) doesn't apply here. The positive feedback messes that all up. Look at it this way: The output is at VCC. Then the voltage at the non-inverting input is VCC(r1/(r1+rfb); call this V(ni). This means that the voltage at the inverting input (...)
Hi. I'm trying to create a non-inverting amp that turns itself on and off whether there's an input signal present or not. The idea is to have a low-power comparator with the input signal connected to the non-inverting input, when the input goes above a sertain threshold, it outputs HIGH thus turning on a (...)
Use OpAmp rail to rail such as OPA340 to amplify the input - use non inverting schematic with amplification. You need ~20x amplification to get 0.14V to 2.8V
this could be quite simple Here is what you need to do: > Make an OpAmp comparator which has a reference of 3V on the inverting I/P and VCC of 3.3V and Output of comparator connected to the Microcontroller I/P > Give your I/P voltage to the non-inverting Terminal of an OPAMP comparator (...)
As from the ti web site: * LM339 VOLTAGE comparator "MACROMODEL" SUBCIRCUIT * CREATED USING PARTS VERSION 4.03 ON 03/07/90 AT 14:17 * REV (N/A) * CONNECTIONS: non-inverting INPUT * | inverting INPUT * | | POSITIVE POWER SUPPLY * | | | NEGATIVE POWER SUPPLY * (...)
Hi Of course you can put LM339 comparator into an non-inverting/inverting configuration ( having feedback loop) but it's not recommended. comparators are not designed to work as linear amplifiers and you'll get a lot of distortions. OpAmps are not designed to work in saturation mode (differential voltage on (...)
Opamp on the left is an comparator that it(ab)used to control the power true the led. The opamp on the right is a non inverting Amplifier that amplifies 11x
Has someone of you already used the TI model provided for PSpice? I downloaded it and tried to simulate the comparator by having a voltage at the non-inverting input larger than the one at the inverting input but the output is always near 0V. Here the model:
Hay I need feed back from the solenoids (24V, 300mA) whether they are switched ON/OFF, I am switching the solenoids using micro controller & IRF510 I kept a resister 1 ohm across the Source to ground and giving the voltage drop to the comparator (non inverting terminal of the LM324) and comparing with ground Point (...)
Hello experts, I am working on a prototype board. I use LM7301 in comparator configuration. See the attached file. When current source I1 is switched off, I expected the V1 on non-inverting input voltage is not above 0.1V which I can accept. But the reality is V1 is about 3.5V!!! After all, the bias current spec in worst case is 500nA. I (...)
hi, everybody... If anybody using comparator with interrupt please help me out, i am working with PIC 16f877A, using internal voltage comparator module with Interrupt. The inverting pin is connected to 0 to 5 volt adjustable external ref voltage. adjusted for 2 volts. non-inverting pin is connected to (...)
I am working with PIC 16f877A, using internal voltage comparator module with Interrupt. The inverting pin is connected to 0 to 5 volt adjustable external ref voltage. adjusted for 2 volts. at non-inverting pin is connected to pure sine wave voltage source (0 to 5 volt). I want interrupt should occur when sine wave (...)
The analog circuit around LM358 has 2 stages: - a non-inverting amplifier, with A=((R13 + R12)/R1 +1), that uses the first opamp of LM358 (INA+, INA-, OUTA); - a comparator with the second opamp (INB+, INB-, OUTB). At OUTA the voltage is variable, so D7 will give a variable light in the heartbeat rythm. The comparator (...)
Implement your inverter with a differential pair whose non-inverting input is tied to a reference of about 1.1 (your threshold) and the input signal sweeps the inverting input.
hello. i'm trying to simulate ,on pspice, the control circuit of 6 MOSFETs in a dc /ac inverter. i want to use spwm for the switching, so i put a comparator(lm339/lm393). a triangular waveform goes to the inverting input, and a sin wave goes to the non-inverting input of the op-amp. the op-amp gets supplied with +10V in the (...)
How about using an LM311 voltage comparator? Power it from ?12V or ?15V. Use a pullup resistor on the output to +5V (or whatever your logic 1 voltage is). Connect the inverting (-) input to ground and your input voltage to the non-inverting (+) input.