Key facts
- Brand
- Analog Devices
- Model
- AN-107
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN · ZH
- Last added
- 2012-08-02
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Analog Devices AN-107 Application Note
This document describes a technique using active feedback to minimize phase error in amplifier circuitry, thereby extending the effective bandwidth by more than an order of magnitude. The method is presented as a cost-effective alternative to using wideband amplifiers or cascading multiple stages, offering better performance than standard RC compensation which suffers from temperature drift.
The note details the theoretical basis for the technique, providing equations for magnitude and phase error, and compares the performance of single-stage, cascaded, and second-order compensation designs. It includes a practical example circuit using the OP-470 quad op amp to demonstrate the significant improvement in phase flatness and bandwidth.
Analog Devices AN-107 specifications
| Unity-gain bandwidth of example op amp | 6MHz |
|---|---|
| Match requirement for op amps | 1 to 2% |
| Example circuit gain | 10 |
All Analog Devices AN-107 documents by type
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the main drawback of using wideband amplifiers to solve phase-error problems?
The wideband amplifier's greater expense is the main drawback to this approach.
Why is cascading multiple amplifiers less desirable than active feedback?
While it increases bandwidth, it pays for this improvement with increasingly higher costs and noise levels.
What is the typical dropout voltage of the LDO at a 2 A load?
The dropout can be as low as 80 mV when the load current is 2 A.
What output voltage accuracy does the ADI LDO provide?
The output voltage is trimmed to within ±1 % at 25 °C.