Double Amplifiers

Hegel Music Systems - DualAmp

www.hegel.com

There is no feedback from the current gain stage to the voltage gain stage. The Hegel DualAmp technology gives lower total distortion and a higher dynamic range than normal audio amplifiers. The Hegel DualAmp technology is developed in-house by Hegel and is only found in Hegel products. DualAmp Technology from Hegel separates the voltage gain stage and the current gain stage into two completely different stages. First, the music signal goes to the voltage gain stage, amplifying only the voltage level of the music signal. By doing only voltage gain in this first stage, we can use amplifier building blocks that are specially designed to do voltage amplification. Multi-channel power amplifiers designed for sound performance... Not priced like diamonds. And still tailored to your needs. Sounds too good to be true? State of the art phono preamplification that improves the sound of your turntable. Designed to get you closer to the music. To get you into the groove. CD players designed to deliver the most faithful sound reproduction possible by optimizing its components to deliver a high-quality output. If you are interested in our products and would like to try or buy one, please find the authorized Hegel distributor in your country. All Hegel audio amplifiers are using a new kind of distributed amplifier technology called DualAmp Technology. This technology is used in all integrated amplifiers and power amplifiers from Hegel.

What Is a Dual Amplifier? (with picture)

www.easytechjunkie.com

https://pdf.textfiles.com/manuals/ELECTRONICS/AV/PA-30_manual.pdf · See our Editorial Process Share Feedback · Networking · What Is a Switch Port? Networking · What Is a Network Driver? Hardware · What Are Pixels? Security · What Is Bluesnarfing? Hardware · What Can I Do about a Lost BIOS Password? What Is a Sub Amplifier? Also known as a two-channel or stereo amplifier, a dual amplifier is an audio component which can take two monophonic line level inputs and increase their output levels to drive two separate speaker systems. Dual amplifiers have historically been popular as a means of amplifying two-channel stereo signals and remain useful in multichannel sound systems. A dual amplifier, whether referred to as stereo, dual, or dual mono, contains two separate channels of amplification in a single box. This has the benefit of both saving space and reducing cost compared to mono amplifiers, since some components can be shared. The term "dual amplifier" is extremely common in the professional audio world where it is used to describe public address (PA) amplifiers as well as speaker amplifiers. It is also popular in car audio, where dual amplifiers frequently deliver power to two subwoofers in a system designed to maximize bass response.

Dual Amplifier - BugBrand

www.bugbrand.co.uk

The Dual Amplifier is made up of two Voltage Controlled Amplifiers (VCAs), paired with two types of waveshaping. The left-hand Amp provides Wave-Folding which adds extra harmonics to signals, along with a second signal input. The right-hand Amp has Zener Diode Saturation which gives soft-clipping, adding weight to signals. It also allows the VCA response to be swept from Exponential to Linear. The VCAs are DC-coupled with gain up to unity. A pair of VCAs with waveshaping built in.

Introduction to the Amplifier an Amplifier Tutorial

www.electronics-tutorials.ws

Introduction to the Amplifier and Amplifier Tutorial including the different types of Transistor Amplifier Classes, Amplifier Efficiency and Gain Note that the DC power gain of an amplifier is equal to ten times the common log of the output to input ratio, where as voltage and current gains are 20 times the common log of the ratio. However, that 20dB is not twice as much power as 10dB because of the use of the log scale. Also, a positive value of dB represents a Gain and a negative value of dB represents a Loss within the amplifier. For example, an amplifier gain of +3dB indicates that the amplifiers output signal has “doubled”, (x2) while an amplifier gain of -3dB indicates that the signal has “halved”, (x0.5) or in other words a loss. Sometimes an amplifier circuit is required to drive a DC motor or feed a loudspeaker and for these types of applications where high switching currents are needed Power Amplifiers are required such as the Class-AB Amplifier. As their name suggests, the main job of a “Power Amplifier” (also known as a large signal amplifier), is to deliver power to the load, and as we know from above, is the product of the voltage and current applied to the load with the output signal power being greater than the input signal power. Amplifier is the generic term used to describe a circuit which produces and increased version of its input signal. However as we will see in this introduction to the amplifier tutorial, not all amplifier circuits are the same as they are classified according to their circuit configurations and modes of operation.

Double-tuned amplifier - Wikipedia

en.wikipedia.org

where δL and δH are respectively the low and high frequencies of the peaks expressed as fractional deviation. With critical coupling or above, the peaks reach the maximum gain available from the amplifier. Critical coupling occurs when the two peaks just coincide. That is, when ... Bakshi & Godse, p. 5.25 · Chattopadhyay, p. 195-196 ... Bhargava, N. N.; Gupta, S. C.; Kulshreshtha D. C., Basic Electronics and Linear Circuits, Tata McGraw-Hill, 1984 ISBN A double-tuned amplifier is a tuned amplifier with transformer coupling between the amplifier stages in which the inductances of both the primary and secondary windings are tuned separately with a capacitor across each. The scheme results in a wider bandwidth and steeper skirts than a single ... There is a critical value of transformer coupling coefficient at which the frequency response of the amplifier is maximally flat in the passband and the gain is maximum at the resonant frequency. Designs frequently use a coupling greater than this (over-coupling) in order to achieve an even wider bandwidth at the expense of a small loss of gain in the centre of the passband. Cascading multiple stages of double-tuned amplifiers results in a reduction of the bandwidth of the overall amplifier. Two stages of double-tuned amplifier have 80% of the bandwidth of a single stage. An alternative to double tuning that avoids this loss of bandwidth is staggered tuning. Stagger-tuned amplifiers can be designed to a prescribed bandwidth that is greater than the bandwidth of any single stage. However, staggered tuning requires more stages and has lower gain than double tuning. The circuit shown consists of two stages of amplifier in common emitter topology. The bias resistors all serve their usual functions. The input of the first stage is coupled in the conventional way with a series capacitor to avoid affecting the bias.

Amplifier Classes and the Classification of Amplifiers

www.electronics-tutorials.ws

Electronics Tutorials about Amplifier Classes and the Classification of Amplifiers which is determined by the amplifiers operating characteristics One method used to distinguish the electrical characteristics of different types of amplifiers is by what is known as “class”, and as such amplifiers are classified according to their circuit configuration and method of operation. The classification of amplifiers range from entirely linear operation (for use in high-fidelity signal amplification) with very low efficiency, to entirely non-linear (were a faithful signal reproduction is not so important) operation but with a much higher efficiency. While others are a compromise between the two. These are defined by the length of their power transistors conduction angle over some portion of the output waveform in which the output stage transistor operation lies somewhere between them being “fully-ON” and “fully-OFF”. The second set of amplifiers are the newer so-called “switching” or digital amplifier classes.