THAT 2181-series trimmable Blackmer voltage-controlled amplifier (VCA) ICs are very high-performance current-in/current-out devices with two opposing-polarity, voltage-sensitive control ports. They offer wide-range exponential control of gain and attenuation with low signal distortion.

THAT Corporation manufactures a range of high performance integrated circuits, including our industry-leading digitally controlled and analog Microphone Preamplifiers, Blackmer® VCAs, Analog Engine® Dynamics Processors, InGenius® balanced (differential) Line Receivers, OutSmart® Line Drivers, Phase Locked Loop ICs, and Transistor Arrays.

2181-series voltage-controlled amplifiers require adjustment (trimming) to achieve their guaranteed performance. After adjustment, however, they boast the best performance of any IC VCA anywhere. This patented audio technology was developed by Gary Hebert, our Vice President for Engineering.

The Blackmer gain cell is an audio frequency voltage-controlled amplifier (VCA) circuit with an exponential control law. It was invented and patented by David E. Blackmer between 1970 and 1973.

The FatKeys™ SSI2164 is perhaps the most flexible VCA available, with four independent channels for lowest cost-per-VCA. The user-selectable mode control allows Class A, AB, or intermediate biasing, and current inputs and outputs provide great design freedom.

2181系列微调百马电压控制放大器（VCA）集成电路是非常高性能的电流/电流输出设备有两个相反的极性，电压敏感的控制端口。 它们提供了广泛的指数控制增益和衰减，低信号失真。 零件包装主要基于修剪THD和控制电压馈入性能后选择。 在电路的调整达到保证失真和接头性能. 控件 [tem_25_34]渲染出错,Source:未将对象引用设置到对象的实例。

2012年12月13日 · AD603 sounds just great to my ears, very simple to use. None of the SQ problems of the other types (VCAs, CMOS opamps). It's a fine chip. I used them in the font end on the optical pickups in a high def film to video (telecine) running them up to 30 MHz. Down side is they only have 40 dB control range and are limited to a few Volts p-p.

A VCA (voltage controlled amplifier/ attenuator) is the heart of any compressor or peak limiter circuit, and there are quite a few different approaches. All available circuits have limitations, and this article looks at the various techniques used.

THAT 2181-series trimmable Blackmer voltage-controlled amplifier (VCA) ICs are very high-performance current-in/current-out devices with two opposing-polarity, voltage-sensitive control ports. They offer wide-range exponential control of gain and attenuation with low signal distortion.

Our single-chip Analog Engines combine in one IC all the active circuitry needed to construct a wide range of audio dynamics processors. They include a high-performance, exponentially controlled Blackmer® VCA and a log-responding rms-level sensor. The THAT4320 includes three general-purpose opamps allowing more complex signal processing.