Tagged Questions

83 views

Which is the correct voltage reference for a single supply instrumentation amplifier?

I'm working on using the TI INA333 in a single 3v supply configuration. I need to create a "mid supply" (half V+) for the REF pin. I have thought of 3 ways to do this: Voltage divider with ...
70 views

inverting op-amp circuit

Why is -Vout equal to the voltage going through Rf? here is a link to a site which explains the inverting amplifier circuit but I couldn't understand why this is.
196 views

Using an Op-amp as comparator

I have a dual op-amp that I want to use as a comparator: Vin should be compared to Vref (1/2 VCC). This is the circuit that I am using (as I have a dual op-amp, I am using a voltage follower on the ...
262 views

Opamp topology without a stable voltage reference

I have an opamp configured as a constant current sink like this: As you can see, the reference voltage for the SENSE pin is set by the voltage divider on the left. This requires a stable voltage on ...
1k views

Negative Voltage Level Shifting to an ADC

I am currently building a project that uses an AD595 analog devices chip to linearize the output of the Thermocouple sensor to 10mv/deg C. This output is to be connected to the ADC input of a Zigbee ...
727 views

op-amps: where to split the rail?

I have been experimenting with op-amp audio amplifiers powered from a 9V battery. I am just wondering how I should go about splitting the voltage from the battery, as I have found 2 ways of doing this ...
271 views

Characterizing raw op amp gain

I thought as a first exercise in op amps, even before setting up a feedback circuit, I would determine the gain of the raw op amp. I tried with an LM324 and an LM358 which should be essentially the ...
241 views

Circuit Nodal Voltage

I have a voltage divider feeding into an op-amp voltage follower buffer circuit. I'm trying to calculate the voltage level at the non-inverting input of the op-amp vs. the source voltage. The possible ...
235 views

How to divide signal level from function generator

I looked for this answer but was unsuccessful so I want to ask the experts here. I have configured an op amp in non-inverting mode (the first in a chain of 3 stages). It is for amplifying extremely ...