Op amps needs dual supply in order to get a full output swing from its input fed signal, here’s a good app note from Analog Devices on powering op amps using only a single supply. Battery-powered op amp applications such … Read more
Tag Archives: op-amp
This video by Analog Devices’ Matt Duff discusses the key term, loop gain, in determining whether an operational amplifier circuit is stable.
This video discusses the total noise of a non-inverting Operational Amplifier (Op Amp) circuit by Analog Devices’ Matt Duff.
Drone writes: Here is a nice little app-note that describes a quick test for op-amp stability using SPICE. (Actually the technique might be useful on the bench as well.) The approach involves applying a step directly to the op-amp input … Read more
How to drive capacitive loads with op amps. Operational amplifiers that drive large capacitive loads can have problems like oscillation and peaking. This article describes how to anticipate and limit theses problems: Other problems include: reduced bandwidth, lower output slew … Read more
This is not really an app note, but more of a tutorial on DIY op-amp based linear regulators. The article describes the basics of op-amp regulator, and includes schematics and in-depth explanations of how the various circuits work. This article … Read more
Here is a application guide from Texas Instruments is an overview of operational amplifier-related circuits, theory, and formulas. Inverting amplifiers, buffers, analog adders, filters, and many more are covered. The general utility of the operational amplifier is derived from the … Read more
Some dsPIC33E and PIC24E microcontrollers have an comparator module that can function as an op-amp [PDF]. The module can be used as a simple non-inverting amplifier by adding two external resistors, no external op-amp chip needed. The output can be … Read more
arup shared his USB DIY Li-ion battery charger circuit in the project log forum. The circuit uses both op-amps of an LM358 to control the charging of a single cell lithium ion battery. Charging automatically stops when the battery is full, … Read more
We have been experimenting with the Touchstone semi TS1001 ultra-low power, low voltage op-amp demo board, and the results are in. For our tests, the board inverting op-amp circuit was powered by a solar cell from a calculator with two … Read more
Touchstone Semi sent a demo board for the record-breaking, low power, low voltage TS1001 op-amp. We covered their design competition earlier. The demo board has a complete support circuit so the parts are ready to evaluate. It’s populated with two … Read more
Touchtone Semiconductor is a startup company whose products include an op amp known as the TS1001, which they say is the only such component to operate on 0.8 V and 0.6uA. They’ve announced a Coolest Op Amp design competition for … Read more
Yesterday we covered the Dangerous DSO analog front end. This circuit divides our +/-10volt input to +/-0.5volts, and re-centers it between the 2volt and 3volt range the ADC can measure. Today we’ll simulate the circuit to get a better feel … Read more
Yesterday we looked at how the Dangerous DSO analog to digital converter works, and it turns out to be a pain in the butt. It only measures a 1volt (1Vp-p) range between 2volts and 3volts. That’s not a very useful … Read more