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Bill Cox
2014-09-30 09:20:28 -04:00
parent 3923ea6006
commit db1c595e79
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@@ -83,9 +83,17 @@ below 1nA of input bias current will enable running at lower frequencies with le
To reproduce these simulations, download the TINA spice simulator from Ti.com. To reproduce these simulations, download the TINA spice simulator from Ti.com.
Here's a "small" INM:
![Schematic of small Infinite Noise Multiplier](infnoise_small/schematic.png?raw=true "Small ![Schematic of small Infinite Noise Multiplier](infnoise_small/schematic.png?raw=true "Small
Infinite Noise Multiplier") Infinite Noise Multiplier")
Note that the upper left op-amp is used as a comparator, and must settle to either 0V or
Vsup before the lower left op-amp can multiply the input by 2X.
Here's a "fast" version that does two multiplications in parallel and uses the comparator
result to select the right one.
![Schematic of fast Infinite Noise Multiplier](infnoise_fast/schematic.png?raw=true "Small ![Schematic of fast Infinite Noise Multiplier](infnoise_fast/schematic.png?raw=true "Small
Infinite Noise Multiplier") Infinite Noise Multiplier")