This is a Brand New lot of 25 That® 4301A Voltage Controlled Amp, RMS-Level Detector, Dynamics Audio Processors. This lot consists of an entire rail with 25 VCA's. THAT 4301 Dynamics Processor, dubbed THAT Analog Engine, combines in a single IC all the active circuitry needed to construct a wide range of dynamics processors. The 4301 includes a high-performance, exponentially-controlled VCA, a log-responding RMS-level sensor and three general- purpose opamps. The VCA provides two opposing-polarity, voltage-sensitive control ports.Dynamic range exceeds 115 dB, and THD is typically 0.003% at 0 dB gain. The RMS detector provides accurate rms-to-dc conversion over an 80 dB dynamic range for signals with crest factors up to 10.
One opamp is dedicated as a current-to-voltage converter for the VCA, while the other two may be used for the signal path or control voltage processing. The combination of exponential VCA gain control and logarithmic detector response decibel-linear response simplifies the mathematics of designing the control paths of dynamics processors. This makes it easy to design audio compressors, limiters, gates, expanders, deessers, duckers, noise reduction systems and the like. The high level of integration ensures excellent temperature tracking between the VCA and the detector, while minimizing the external parts count.FEATURES High-Performance Blackmer® Voltage Controlled Amplifier High-Performance RMS-Level Detector Three General-Purpose Opamps Wide Dynamic Range: >115 dB Low THD. The VCA in Brief THAT 4301 VCA is based on THAT Corporations highly successful complementary log-antilog gain cell topology, as used in THAT 2180-Series IC VCAs. THAT 4301 is integrated using a fully complementary, BiFET process. The combination of FETs with high-quality, complementary bipolar transistors (NPNs and PNPs) allows additional flexibility in the design of the VCA over previous efforts.
The RMS Detector in Brief The 4301s detector computes rms level by rectifying input current signals, converting the rectified current to a logarithmic voltage, and applying that voltage to a log-domain filter. The output signal is a dc voltage proportional to the decibel-level of the rms value of the input signal current. Some ac component (at twice the input frequency) remains superimposed on the dc output. The ac signal is attenuated by a logdomain filter, which constitutes a single-pole rolloff with cutoff determined by an external capacitor and a programmable dc current.The Opamps in Brief The three opamps in the 4301 are intended for general purpose applications. All are 5 MHz opamps with slew rates of approximately 2V/µs. All use bipolar PNP input stages. However, the design of each is optimized for its expected use.
Therefore, to get the most out of the 4301, it is useful to know the major differences among these opamps. We promise to respond to your questions and concerns! Powered by SixBit's eCommerce Solution. The item "25 That 4301A RMS-Level Detector, Voltage Controlled Amp, Dyn.Audio Processor" is in sale since Thursday, December 22, 2016. This item is in the category "Business & Industrial\Electrical Equipment & Supplies\Other Electrical Equipment & Supplies". The seller is "total_parts" and is located in San Jose, California. This item can be shipped to United States, Canada, United Kingdom, China, Mexico, Germany, Japan, Brazil, France, Australia, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.