Design Note 00A   Basic Compressor/Limiter Design (113k)

Design Note 01A   The Mathematics of Log-Based Dynamic Processors (64k)

Design Note 02   Digital Gain Control with Analog VCAs (106k)

Design Note 03   Signal Limiter for Power Amplifiers (95k)

Design Note 04   Improving Loudspeaker Signal Handling Capability (217k)

Design Note 05   A Low Parts Count, Two-Slope Compressor (78k)

Design Note 100   A Fully Adjustable Noise Gate (69k)

Design Note 102   Adjustable Ducker using the THAT 4301 (76k)

Design Note103/104   Improving VCA Performance I (56k)

Design Note 106   What to look for when the Distortion in 2180s Doesn’t Match the Specs (57k)

Design Note 107/111   A Simple Effective Soft-Knee Compressor / Limiter (81k)

Design Note 110   Improving VCA Performance II and III (73k)

Design Note 112   LED Bar-Graph Compression Indicator (83k)

Design Note 115   Fully Adjustable Compressor/Limiter (46k)

Design Note 116   Techniques for Stereo Volume Control (126k)

Design Note 117   Input Limited for ADCs (120k)

Design Note 118   High Performance Stereo AGC (90k)

Design Note 119   Wide Ranging dB Meter (177k)

Design Note 120   VCAs in a Pan Potentiometer Application (127k)

Design Note 122   5.1 Channel Volume Control (67k)

Design Note 125   The “One Knob Squeezer”  (90k)

Design Note 128   What’s a PTAT Temp. Coefficient, & Where Does It Come From?  (64k)

Design Note 129   A Low-Cost VCA Limiter (47k)

Design Note 130   VCA-Controlled 1st Order State Variable Filter (174k)

Design Note 131   Dealing with the PTAT Coefficient (75k)

Design Note 132   Alternate Method of Indicating Compression (52k)

Design Note 137   Substituting THAT 218x VCAs for 215x VCAs in Existing Designs (68k)

Analog Secrets Your Mother Never Told You (1528k)

Originally presented at the 123rd AES Convention, this seminar provides tips and techniques to achieve optimal performance in the analog signal path. Topics covered range from inputs (balanced line and mic level) to outputs (balanced to single-ended), and include analog signal processing (VCAs, RMS detection, and Analog Engines).

2180 Series Device Model

Our SPICE macro models allow modeling of the important parameters of our ICs.

2180 Series Demo Board - The THAT 2180 Series Demonstration System (US$100) allows the engineer to test the performance of a THAT2180 quickly and easily. The 2180 Demo Board is self-contained circuit board with XLR connectors for signal input and output and a 3-pin header for connection to an external regulated DC power supply (not included). See the 2180 Demo Board Datasheet for more information.

Harsh Environment Packaging - TT Semiconductor repackages THAT Corporation’s IC products in ruggidized plastic for the medical, aerospace, defense, and heavy industrial marketplaces.

The History of VCAs - THAT Blackmer® VCAs are the successors to the original dbx® line of VCAs. Their development for professional audio use has a long history, and can provide some insight into the care and feeding of these essential devices.

2180L Material Data Declaration Sheet (SIP Package)

Material Data Declaration Sheets (MDDS) disclose the hazardous materials in our integrated circuits as required by the European RoHS directive.