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October 2004 -  For immediate release ...


An InGenius Way to Eliminate Noise

THAT 1200-Series Line Receiver

THAT 1200-Series High-CMRR
Balanced Line Receiver


Milford , MA - THAT Corporation is auditioning its InGenius® balanced line receiver ICs at booth 1519 on the AES show floor. According to the company’s President, Les Tyler, "With InGenius, design engineers can now build true, real-world interference rejection into their audio equipment. These ICs incorporate patented circuitry that significantly improves over the noise- and interference-canceling ability of other integrated solutions." THAT’s InGenius IC family is now available in surface mount and through-hole packages, in three different gain options to suit specific applications. According to Denise Waterhouse, Sales/Marketing Manager, all six versions are now available from stock.

THAT’s Chief Technical Officer, Gary Hebert, offered some details: "Conventional balanced line receivers must be driven by perfectly matched source impedances in order to effectively reject hum and interference in audio systems. It’s easy to sustain ideal conditions in the lab, but in the real world, audio outputs, cables and connectors are subject to all sorts of imperfections that cause impedance mismatches. You just don’t get lab conditions at a concert!"

THAT’s InGenius line receivers use technology developed and patented by Bill Whitlock, President of Jensen Transformers. He explained, "My design is almost completely insensitive to the source impedance imbalances which overwhelm typical balanced input stages. InGenius line receivers act like a transformer to present an extremely high input impedance to common mode (noise) signals. Even with a 600 ohm source-impedance imbalance, the InGenius topology delivers 70 dB typical common mode rejection. No other solid-state input stage can deliver that performance!"

THAT’s Principal Engineer Fred Floru, who designed the InGenius IC family, noted that the company will demonstrate just how much difference the InGenius can make. "Come by our booth and put on headphones to compare traditional balanced inputs with InGenius. Both Bill and I will be on hand to prove to you that one listen will make you a believer!"

Interested readers can learn more on Saturday Oct 30th, in session K (Signal Processing part 1) at approximately noon, when Bill presents a paper co-authored by Fred Floru. The paper is entitled New Balanced-Input Integrated Circuit Achieves Very High Dynamic Range in Real-World Systems.

Audio performance for the THAT 1200-series is uniformly high, with 12V/ms slew rate, 20MHz gain-bandwidth product, and 0.0005% audio-band THD. Fred Floru noted, "as with our 1240-family, the InGenius® 1200 family is available in three different gains – 0, -3, and -6dB – to match different customer requirements. The -3dB version is unique. We believe it represents the optimum tradeoff between noise and headroom for real-world applications."

The 1200-series are made using THAT’s proprietary dielectric isolation (DI) process in the company’s Milpitas, California fabrication facility. Mr. Tyler said that, due to the DI process's ability to deliver discrete device performance, "these parts sound like discrete designs, but with the size, reliability, and convenience of ICs."

Priced at $2.87 (1k) in an 8-pin SO package, the InGenius® THAT 1200-series is a superior alternative to all other line receivers. For more information, visit the 1200-series page.

About THAT Corporation
THAT Corporation, founded in 1989, designs and sells high-performance analog integrated circuits for professional audio manufacturers. THAT’s ICs include analog input and output stages, digitally controlled low-noise preamplifiers, Analog Engines® and its original line of voltage-controlled amplifiers (VCAs) – all used throughout the pro audio industry. The company also licenses patents, trademarks, and other intellectual property to the TV broadcast and reception industries. Licensed products include the dbx-tv® Total™ series of audio enhancement technology and digital implementations of legacy TV audio receiver standards. The company is headquartered in Milford, Massachusetts, with offices in Milpitas, California.

For more information, contact:
  THAT Corporation, 45 Sumner Street, Milford, MA 01757-1656 , USA
  Telephone: +1 (508) 478-9200; Fax +1 (508) 478-0990

Editorial Contact:
  Ken Nevard, IC Marketing Manager
  Tel: +1 (508) 478-9200 x108


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