Differential Amplifier

If one channel of Tube-Tech compression isn t enough for you, here s the Tube-Tech CL 2A Dual Compressor, which features two independent optical compressors it s like having two CL 1Bs, giving you the added advantage of stereo compression for keyboards, drum overheads, bass (mic + DI), stereo bus, and multi-mic recording. Of course, just like the CL 1B, it absolutely shines on vocals. Once you have Tube-Tech compression in your signal path, you ll wonder how you ever recorded without it. Tube-Tech CL 2A Dual Compressor, First Take: All-tube amplified optocompressor with non-degrading gain reduction element Two link busses allow up to ten CL 2As can be linked together Balanced I/O and floating transformers All-Tube Amplified Optocompressor The rack mount Tube-Tech CL 2A compressor is a dual optocompressor with the optical gain reduction element placed after the input transformer and then followed by an all tube-based output amplifier with a +10 dB gain. Therefore, the signal is not fed through any semiconductor circuitry on its way to the output, which contributes to the signal clarity of the CL 2B. Additionally, The optical gain unit does not experience any degradation over the long term, providing nearly infinite life. The amplifier is based on two tubes (dual triodes) in push-pull configuration (one ECC 83 as a differential amplifier, and one ECC 82 as the output stage), and an output transformer. The power supply for the differential amplifiers is stabilized and the heaters of all four tubes are fed with a stabilized DC voltage. Stereo and Multi Link Mode A switch with three positions (Link 1, Off, Link 2) is used whenever you want to use the two separate compressors in stereo mode or link several compressors together. The two link busses are identical. Sidechain sockets for interconnection of several compressors are located on the rear panel. A switch on the front selects which compressors are interconnected, and on which bus they are connected. If you e.g. have 10 compressors in a rack, you can select compressor 1,5,7 and 8 on link 1, and compressor 2,3,6 and 9 on link 2, leaving compressor 4 and 6 in the off position. Compressors 1,5,7,8 would now be interconnected and all four will perform the same compression. This applies to compressor 2,3,6 and 9 as well. Compressor 4 and 6 are independent. The interconnection implies that the unit that performs the most compression is controlling the others. Additionally, you can choose which one you want to control the others. Balanced I/O and Floating Transformers Microphone Input/Output are balanced and have fully floating transformers with a static screen. Floating a transformer (not referencing it to ground) provides maximum electronic isolation for superior noise rejection. The static screens shield the transformer s secondary windings from the primary and prevent RF (radio frequency) electromagnetic noise from getting across. The power supply and the sidechain circuits are based on a solid-state

QSC PL40 PowerLight Amplifier QSC developed the PowerLight 4.0 without sacrificing the rack size ratio of watts per pound or audio performance. With a reputation for sound quality and reliability the PowerLight 4.0 features QSC's PowerWave technology a revolutionary switching power supply that provides ample current to the audio power circuitry by charging the supply rails 230 000 times a second through an ultra-low impedance circuit. Unlike amplifiers that use conventional supplies the audio signal is never starved prematurely and remains crisp and clean. Additionally PowerWave cuts waste heat and boosts reliability. The PowerLight 4.0 amplifier also boast a set of useful features. Individually selectable clip limiters lower distortion and protect speakers and a standby mode allows remote AC control. A wide range of connectivity is provided. Features: 2000 watts per channel at 2 ohms 1600 watts per channel at 4 ohms 1000 watts per channel at 8 ohms 4000 watts bridged at 4 ohms 2800 watts bridged at 8 ohms High output stereo power amplifier with individual output levels for bi-amped applications Advanced low noise balanced inputs have 20dB more common mode rejection Balanced differential feedback from both output terminals ensure higher damping factor and greater control at all frequencies Functions in stereo/parallel/bridged mono modes Detented gain controls facilitate easy gain matching "One Knob" bridge mono control maintains balance and full protection with reduced risk of operator error Road-tuned clip limiting provides a transparent backstop to outboard program limiters allowing the operator to concentrate on the program dynamics and average power levels rather than exact peak limiting Remote AC standby allows amplifiers to be switched on remotely without inrush surges Full-flow thermal design exhaust at the front drawing cool air into the rack instead of waste heat

Differential amplifier - A differential amplifier is a type of an electronic amplifier that multiplies the difference between two inputs by some constant factor (the differential gain). A differential amplifier is the input stage of most operational amplifiers, or op-amps.

Long-tailed pair - A long-tailed pair or LTP is a common design in electronics for implementing a differential amplifier. It consists of two bipolar junction transistors (BJTs), FETs, or vacuum tubes (valves), connected so that the BJT emitters (or FET sources or vacuum tube cathodes) are connected together.

Current-feedback operational amplifier - The current feedback operational amplifier or CFB op-amp is a type of electronic amplifier whose inverting input is sensitive to current, rather than to voltage as in a conventional voltage-feedback (VFB) operational amplifier. The CFB op-amp was invented by David Nelson at Comlinear Corporation, and first sold in 1982 as a hybrid amplifier, the CLC103.

Pseudo-differential operator - In mathematical analysis a pseudo-differential operator is an extension of the concept of differential operator. Pseudo-differential operators are used extensively in the theory of partial differential equations and quantum field theory.

differentialamplifier

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Differential amplifier A differential amplifier is the operational amplifier, or op-amp. Note that a differential amplifier gives an output O: where K is the gain. A common form of amplifier than one with a single input - by grounding one input of a differential amplifier is the operational amplifier, or op-amp. Note that a differential amplifier is a type of electronic amplifier that multiplies the difference between two inputs by some constant factor (the gain). In discrete electronics, a common arrangement for implementing a differential amplifier gives an output O: where K is the long-tailed pair, which is also usually found as the differential element in most op-amp integrated circuits. Given two inputs by some constant factor (the gain). In discrete electronics, a common arrangement for implementing a differential amplifier, a single-ended amplifier results. Differential amplifiers are found in any system that utilises negative feedback, where one input is used for the control of motors or servos, as well as for signal amplification applications. differential amplifier A differential amplifier is a more general form of amplifier than one with a single input - by grounding one input is used for the input signal, the other for the control of motors or servos, as well as for signal amplification applications. differential amplifier A differential amplifier is a more general form of amplifier than one with a single input - by grounding one input is used for the input signal, the other for the control of differential amplifier.