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Channel: Analog : operational amplifier
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Correcting DC errors in high-speed amplifier circuits

Other Parts Discussed in Post: OPA656When both high DC accuracy and high bandwidth are required at the same time, it may be difficult to implement.  Depending on the circuit configuration, there are...

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What you need to know about input bias current – and why

Other Parts Discussed in Post: THS4551One of my standard interview questions for new college graduates is to describe the non-ideal aspects of an operational amplifier (op amp). While most candidates...

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What you need to know about internal ESD protection on integrated circuits

Most of the integrated circuits that I work with are electrostatic discharge (ESD)-sensitive. In spite of all the care we engineers take, it is nearly impossible to eliminate static electricity...

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Minimize your current, pick a sweet spot!

Pick any CMOS or JFET amplifier and you’ll get the lowest possible input bias (Ib) current, right?Not so fast. If you mean low Ib compared to that of bipolar, then yes. But if you mean sub 10pA, there...

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What you always wanted to know about TINA-TI but were afraid to ask! (Part 4)

Other Parts Discussed in Post: TINA-TI, LMH6554This installment of the TINA-TI series is based on your requests from the list in Part 1. In this post we’ll learn how to generate:Time varying (piecewise...

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Increasing dynamic performance in radar systems

If you’re designing automotive radar or even commercial or military radar systems, we are all bound by physics.  I’d like to change that, but many of my old professors in college said “there are rules...

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How to use EMI hardened op amps to reduce your errors

Other Parts Discussed in Post: OPA172, LMV831Challenge: Before the birth of electromagnetic interference (EMI) hardened amplifiers, system designer like yourself was left to implement your own...

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What you always wanted to know about TINA-TI but were afraid to ask! (Part 3)

Other Parts Discussed in Post: TINA-TI, LMH6629Whether or not you were ever “afraid” to ask about any of the TINA-TI topics we discussed in Part 1 or in Part 2 of this Analog Wire series, I’m hoping...

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How to evaluate a transimpedance amplifier (part 2)

Other Parts Discussed in Post: OPA857, BUF602, PGA870In my previous blog on "How to evaluate a transimpedance amplifier, part 1", we looked at the OPA857 performance, but didn’t go in depth in...

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Is it time to move beyond FR4?

Is your circuit board compromising your circuit?  Is it time to consider a change from the standby FR4 board material?  With rising operating frequencies and higher data rates, signal fidelity is more...

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A new era for CMOS amplifiers

Other Parts Discussed in Post: OPA192A little over a decade ago, semiconductor design and applications engineers high fived each other when they had working silicon on CMOS because it achieved sub...

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What you always wanted to know about TINA-TI but were afraid to ask! (Part 2)

Other Parts Discussed in Post: TINA-TI, LMH6703In Part 1 I explained how to create a versatile and accurate differential source in TINA-TI which comes in handy when dealing with a fully differential...

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Let there be light: Converting light into voltage

Converting light into a voltage is no trivial task. Photodiodes are used in various areas ranging from general purpose use, such as automatic faucets, hand dryers and bill counters, to industrial...

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What’s the difference between macro models and behavioral models?

Have you ever wondered what the difference is between a Spice macro model and a behavioral model?             The basic difference is that macro models like the LMV641 are transistor based. There’s of...

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Noise gain, signal gain, what a pain!

When I was little my grandfather would ask me “what’s heavier, 5 pounds of lead or 5 pounds of feathers?” and I would immediately answer “lead of course!”Although the volume is not the same, the weight...

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Decompensated op amps to the rescue

With all the handheld devices at our fingertips these days, from PDA’s and smart phones, to medical devices and test equipment, it’s no surprise we need them to last as long as possible before giving...

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How tiny data converters give you more value per square

(Note: Kaustubh Gadgil and Robert Schreiber co-authored this technical article.)With the increased trend toward smaller systems, every square millimeter of printed circuit board (PCB) area matters. At...

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How to boost the performance of your resolver – without compromise

Motor control is an essential part of electric vehicles, which generally use permanent magnet AC motor (PMAC) or induction motors. There are advantages to both types, as well as trade-offs.PMAC motors...

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Why signal isolation matters in 48-V HEV/EV systems

One of the key differences between conventional internal combustion engine vehicles and hybrid electric vehicles (HEVs) or electric vehicles (EVs) is the presence of multiple batteries and voltage...

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How stepper motors improve noise and efficiency in automotive system design

Stepper motors are popular in vehicle lighting systems for headlight leveling and steering. As automakers transition to quieter electric vehicles, noise reduction in these systems becomes more...

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