Hivi H · System for high-quality playback of music and movie sound effects, it uses the entire active combination mode, each System consisting only of sound · H are independent power amplifier design, completely eliminated by the Cabinet and the differences and auxiliary power amplifier adverse effects. Hivi H4 H · System is an important component of its own and is a quality high 2.0 household za.
Although the positioning in the field of home monitoring and application of home entertainment, in the course of H4 is still equipped with a very sophisticated driver circuit to face the challenges of a variety of applications. The following is the hivi H4 amplifier backplane Assembly diagrams, H4 amplifier back plate is a thickness of 5 mm aluminum plate, has guaranteed the box body strength and auxiliary cooling. As H4 is a set of miniature monitoring system, its interior is not too much space for engineers, compact arranged circuit efficient circuit and internal structure to become the focus of the design.
From hivi H4 amplifier backplane Assembly diagram we can see its internal structure is generally divided into three parts: the first-level signal conditioning processing part, after the level on most of the built-in heatsink portion. Built-in heatsink fin density is very high, the savings pass rapidly after heat into the air, and then passed down in constantly in and out of the tube with the air out of the box. Fore, back-up to two circuits of glass fibre plate made of high quality and extensive use of SMD components, effectively reducing the volume of the circuit and to improve the consistency of the circuit.
In the course of the first-level circuit H4 is present in all multimedia speaker system is the most complex, just from the number of operational amplifier can speak for themselves. H4 's fore circuit uses a total of 7 block operation chip contains 4 block 4 channel amplifier TL084, 2 2 channel amplifier block TL082 and 1 block LM13700 interconvertible amplifier. 4 block TL084 and composed of 2 blocks TL082 op 20-channel array to complete electronic crossover H4, frequency tuning and electro-acoustic tuning.
LM13700 mutual guide produced by the United States national operational amplifier, applied to the H4 overload protection circuit for H4 in great dynamic without distortion of the work and to effectively protect the power amplifier and speakers. Want to know this is just one of the fore H4 handling section, a circuit to H4 doubled the complex. In addition to the first-level circuit H4 in imported CBB capacitance (metallized polypropylene capacitors).
Metallized polypropylene capacitors are a low loss, high accuracy, insulation, and self-healing, high anti-interference characteristics; CBB capacitance characteristics than ordinary more excellent homopolar capacitance, audio characteristics for the better. On the input circuit using balance circuit input H4, and adopted two red "WIMA vimak audio as coupled with", so that high frequency to be more analytical and more exquisite details.
Back level power supply and put most of the performance of the H4 perfect powerhouses hivi H4 ring transformer equipped with 55W, every output power RMS for 45W. Power supply filter capacitor consists of 4 PCs 1000uF 50V voltage of capacitor capacity constitutes the total filtering capacity 4000uF. Use parallel filter capacitor array instead of a high capacity filter capacitor has the advantage of faster power supply part of the charge and discharge rates, lifting system low frequency control and hierarchy.
As a professional electronic crossover design, final amplified audio signal from two United States national LM3886 chip produced, are used to drive the treble and bass unit cell. LM3886 amplifier IC at rated operating voltages up to average 68W no distortion of continuous power output, and has the perfect over-voltage, over-current and over-temperature protection features, and its excellent sound quality of driving force and performance make it the H4 after the class driver is equipped with the best solutions.
No comments:
Post a Comment