My project 96 kHz Audio ADC and DAC is replaced by the improved versions 24 Bit / 192 kHz Audio ADC AD24QS with the optional preamplifier AD-IOA, the Audio 24 Bit / 192 kHz DAC DA24QS and the 24 Bit / 96 kHz Audio DAC DA24DS The ADC, AD-IOA and DAC kits are available

A perfect expansion for the 24 Bit / 192 kHz Audio ADC: A Dual Channel Preamplifier for the AD24QS with very high performance - but unfortunately obsolete

I always wanted to know how to do it (and now I do): Converting Analog into Digital (IIR) Filters - A Recipe (almost...) - Including my program AnaDigFilt.exe that helps to find out the digital coefficients and lets you explore what happens in case you "play" with them

Something completely digital, growing more and more luxurious: The new VFD-equipped DPLCM-VFD An FPGA-Based Digital Audio Peak Level and Correlation Meter with many features is the successor of the LED-equipped DPLCM

How to measure different parameters on a condensor microphone capsule: Backplate Voltage Driven Condenser Microphone Capsule Measurement (CM2)

An experiment to design An RF-Circuit for Condenser Microphone Capsules

The concept of an Extreme Low Noise Preamplifier with down to 0.45 nV/Sqr(Hz) or even 0.37 nV/Sqr(Hz) of input voltage noise

My Java-Script filter design utility is able to dimension active high- and low-pass filters and now even single stage, 3rd order, low-pass filters: Active Filter Design and Dimensioning

Over a long time delta-sigma codecs appeared to be a sealed book for me - until I started to teach myself: An Introduction to Delta Sigma Converters ( Eine Einführung in Delta-Sigma-Wandler)

The "RF-Wallpaper" was a valuable aid for me from my early beginnings in electroncs on. Now I made it myself and do not need bad copies from books any more: The RF-Wallpaper / Die HF-Tapete  and

A nomogram, an online-calculator and some background information about Resistor Noise / Widerstandsrauschen  and

Frequency responses can be measured much faster than with sweeped sine signals: Instant Audio Frequency Response Measurements using Soundcards, FFT-Software and Multi-Sine Signals

Some additional equipment for audio measurements: Audio Preamplifier Weighting Filter Set Universal Filter

An analog-to-digital- and digital-to-analog converter for the USB (in German only): ADDA-USB

My little POV-Ray Project was made during a few holiday days. It's German, but there is not much to read, there is more to see.

2 small articles of mine, on Rod Elliott's site Reverse RIAA Equaliser: How to use a needless phono input as a universal line input? Transformerless Balanced Line Driver with Floating Output: Amplifier with transformer-like output properties

I was curious about the inside of such a battery pack (updated): Analyzing a Chinese Battery Pack Clone (updated)

 

Last update: February, 27th, 2013

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