From 9030ab40e51a4572aa9157b580576d85dedb9190 Mon Sep 17 00:00:00 2001 From: Bill Cox Date: Mon, 29 Sep 2014 12:13:24 -0400 Subject: [PATCH] Modified README --- README.md | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/README.md b/README.md index e1efe2b..010d1ff 100644 --- a/README.md +++ b/README.md @@ -79,13 +79,18 @@ an attacker. There are currently 3 versions of Infinite Noise Multipliers documented here. The infnoise_small directory describes a low part-count design that works well with op-amps -which have rail-to-rail inputs and outputs. The infnoise_fast directory contains a faster -design that uses a few more resistors and an additional op-amp. This design is suitable -for use with a wide range of op-amps. +which have rail-to-rail inputs and outputs. It runs at 4MHz, outputing 0.84 bits worth of +entropy on each clock (loop gain = 1.8), for a total of 3.36Mbit of entropy produced per +second. The infnoise_fast directory contains a 50% faster design that uses a few more +resistors and an additional op-amp. This design is suitable for use with a wide range of +op-amps. It runs at 6MHz, outputing 0.84 bits worth of entropy on each clock (loop gain = +1.8), for a total of 5.04Mbit of entropy per second. Because Infinite Noise Mulitpliers are switched-capacitor circuits, it is important to use -components with low leakage. Op-amps with below 1nA of input bias current will enable -running at lower frequencies with less power. +components with low leakage, like the OPA4354 CMOS quad op-amp from TI. Op-amps with +below 1nA of input bias current will enable running at lower frequencies with less power. + +To reproduce these simulations, download the TINA spice simulator from Ti.com. ![Schematic of small Infinite Noise Multiplier](infnoise_small/schematic.png?raw=true "Small Infinite Noise Multiplier")