An application report on op-amp noise analysis from Texas Instruments. Link here (PDF) As system bandwidths have increased, an accurate estimate of the noise contribution for each element in the signal channel has become increasingly important. Many designers are not, however, particularly comfortable with the calculations required to predict the total noise for an op […]
Using Apex Microtechnology’s power op amps for voltage controlled current sources (VCCS’s) application note, Link here (PDF) Voltage controlled current sources (or VCCS’s) can be useful for applications such as active loads for use in component testing or torque control for motors. Torque control is simplified since torque is a direct function of current in […]
Here is a comprehensive guide to operational amplifiers from Texas Instruments. It contains most of the things you ever wanted to know about designing with op amps. History, design examples, and theory is all covered by this guide. Via Electronics-Lab.
Ian Griffiths writes to inform us of this Op Amp Selection Guide available from Analog Devices. This 58-page PDF offers a complete overview of their product offerings. As Ian G. points out, “it has 3 pages devoted to different terms used for describing op-amp characteristics and different op-amp types to help those trying to select […]
A few weeks ago we covered the Touchstone Semi TS1001 ultra low-power and low-voltage op-amp. Ultrasounder commented: Looking at the datasheet, the key [specs] reveal a very lousy, CMOS input-output opamp which is not speced for anything beyond audio. The GBW is 4KHz which means that the max frequency this thing can reliably amplify without […]
If you’re new to op amps or just need a refresher on the theory this conf might interest you. Analog Devices is offering a free webinar titled Intro to Operational Amplifiers scheduled for July 26, 2011 at 12 PM CDT. The presentation will last 45 minutes followed by a 15 minute Q&A. John Ardizzoni, Senior […]
It’s the last day of our week-long Dangerous DSO adventure. Yesterday we simulated the analog front-end and found a few changes to test. First, we’re going to increase the ADC buffer gain to 2. That should make vertical offset adjustment easier. Second, we’re going to try a more refined input range divider with a 900K […]
The operational amplifier is one of the most useful analog ICs available, and one of the most daunting for beginners and experienced engineers. Above is a diagram of an op-amp in a closed loop non inverting configuration. Probably the most used configuration. Lets assume this is an ideal amplifier. R1 is the input and R2 […]