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41 Threads found on edaboard.com: Inverting Comparator
Hello folks, I am wondering if there is a comercial part which is able to invert a square signal from 0 to 24V. The most of the comercial buffers and Line drivers that I found dont support 24V of power supply. I have trying to do it with an Op Amp configured in inverting mode but it is not working. PS: The maximum frequency of the square s
Hi, I'm looking for a current mode controller (such as UC3842 or MC34063) in which I can have acess to the inverting input of the amplifier used for current measurement. The idea is to change the current by varying the reference voltage at which the comparator triggers, rather than having to use a potentiometer to vary the signal from the shunt
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.
Hai everybody, i am using pic32 microcontroller. For testing comparator module i have given 1.8V to the C1IN+ pin which is configured to be connected to comparator inverting input and CVref(1.55V) is configured to be connected to non-inverting input of comparator. When i have given 1.8V input the (...)
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 of the input (...)
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 inverting input. But what I see (...)
Don't give the sine wave directly, use a comparator with the inverting terminal grounded. This will convert the sine to a square, then measure the time period of high signal as sankar.m8 explained. This will give half pulse time, double it to get the complete wave time, assuming you have a symmetric wave.
My personal preference is wiring each unused FET OP as unity gain buffer with non-inverting input connected to circuit ground.
So in correct to say that the output will be grounded if -V is higher than +V ??? Thanks for the reply and sharing your experience. Hi RHeTTRoNiCS If your mean by -v is inverting input and if minus supply rail is tied into the ground then yes that's true . Best Wishes Goldsmith
Different FPGA families might have different common mode ranges. You could try an "inverting" comparator configuration with one input biased to mid supply and input voltage and feedback summed by two resistors. Or use a voltage divider and reduced input voltage range.
This comparator circuit works as follows - when the inverting input voltage level falls below the reference voltage (about 0.7V) the output goes high. Which input voltage? It's not shown in the schematic. Is it asking too much to expect a schematic that fits the question?
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 must be greater than V(n1) in order (...)
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 mosfet. I've connected a cap from the (...)
Hi TXRX I don't think that it can oscillate at that frequency , as FvM said . by the way , how you saw 2GHZ ? with oscilloscope ?????? anywhere , if it is really happened , you can add a series RC network from out put into inverting input ( however it is a comparator ! ) Best Wishes Goldsmith - - - Updated - - - By th
The output of the LM566 is a triangle wave, which is applied to the inverting input of the opamp. The frequency control potentiometer (P1) lets you change the frequency between about 100Hz and 600Hz. The 28K resistor, the 18K resistor, and the other potentiometer (P2) form a resistive divider that allows you to set the DC control voltage on the no
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 > Now whenever (...)
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 * | | | | OPEN
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 inputs is non (...)
There doesn't seem to be much that can be said about it. The CA311 is an equivalent of the LM311 I assume. R128 & VR103 form a potential divider between the +12V and GND to set the threshold voltage on the inverting input. The pullup R129 gives a 5V output (the comparator output is open collector). The strobe pin (6) would normally be left open