ESR metar

[mikikg]

Samo da bacim jedan zanimljiv link tj IC za integrisani digitalni Z metar:
http://www.analog.com/en/rfif-components...oduct.html

The AD5933 is a high precision impedance converter system solution that combines an on-board frequency generator with a 12-bit, 1 MSPS, analog-to-digital converter (ADC).
The frequency generator allows an external complex impedance to be excited with a known frequency. The response signal from the impedance is sampled by the on-board ADC and a discrete Fourier transform (DFT) is processed by an on-board DSP engine. The DFT algorithm returns a real ( R ) and imaginary ( I ) data-word at each output frequency.

- Impedance measurement range from 1 kΩ to 10 MΩ
- Capable of measuring of 100 Ω to 1 kΩ with additional circuitry