UNDERSTAND THE NATURE AND BRACE PURPOSE UNDERSTAND NATURE SIGNAL AUDIO By Sarbini, S.Pd (SMK Muhammadiyah 3 Yogyakarta)

Teknologi dan Rekayasa A. AMPLIFIER Amplifier or power amplifier function amplify the audio signal and then follow to the loudspeaker POWER AMPLIFIER Power Amplifier tata panggung

Teknologi dan Rekayasa  Fidelitas and Efficiency Fidelity means that the similar form of the output signal of a replica of the original input signal. Brace system is said to have fidelitas high (high fidelity), if the system is able to produce the output signal of exactly the same as the input signal.

Teknologi dan Rekayasa Efficiency: comparison of power output than the input power. Brace system said to have high levels of efficiency (100%) if there is no loss-loss in the process amplify / no power be heat.

Teknologi dan Rekayasa B. AMPLY VARIOUS 1.Class A Characteristics:  Signal output work on active areas.  Fidelitas high  Form of signal keluarannya match the input Low efficiency (25% - 50%).  Transistor is always ON, so most of the power source portion terbuang heat.  Transistor class A brace plus the necessary extra cooling (such as a larger heatsinks).

Teknologi dan Rekayasa  Kurva amply class A

Teknologi dan Rekayasa 2. CLASS B Characteristics :  Phuspull / Transistors work alternately between the transistors Q1 (NPN) and Q2 (PNP).  Heat generated is not too large  Greater efficiency (75%)  There is a cross-disability (cross over)  Power supply voltage +, _ and Ground

Teknologi dan Rekayasa Curve amply class B

Teknologi dan Rekayasa  Series amply class B

Teknologi dan Rekayasa 3. CLASS AB Characteristics :  Phuspull / transistors work alternately between the transistors Q1 (NPN) and Q2 (PNP).  Heat generated is not too large  Greater efficiency (50% s / d 75%)  Disability does not occur cross (cross over)  Fidelitas Highest  There was a signal on my second transistornya actively at the time of transition (gumming).  Power supply voltage +, _ and Ground

Teknologi dan Rekayasa Series brace Class AB OVERLAPPING OUTPUT PENGUAT KELAS AB

Teknologi dan Rekayasa 4.CLASS C Characteristics :  Transistors only need one  work only on the active phase positive  High efficiency (100%)  Fidelitas lower than class AB  Often used in a series of transmitter oscillator  Working in the area of active / linear

Teknologi dan Rekayasa Series brace Class C

Teknologi dan Rekayasa 5. CLASS D Characteristics Using the PWM technique Pulsa Width Modulation) where the width of the balance is proportional to the input signal amplitudo.

Teknologi dan Rekayasa Illustrated amply PWM modulation class D

Teknologi dan Rekayasa  Working as a switching transistor  Using sampling techniques  require a triangular wave generator and comparator to produce a signal proportional to the PWM signal input amplitudo.  Raising fidelitas required to filter Brace is often used in digital 1 bit (on or off).

Teknologi dan Rekayasa 6. CLASS E Characteristics:  Brace similar to the class C  Require a series of LC with a working transistor less than half a duty cycle  Working as a switching transistor  Usually require the type of FET transistors

Teknologi dan Rekayasa  Efficient and suitable for applications that require large drive currents, but with the input current is very small.  Disipasi small heat  Usually applied to the transmission equipment such as mobile phone

Teknologi dan Rekayasa 7. CLASS T Characteristics :  Also called digital brace  Using the concept of modulation PWM switching transistor and the filter  The process is a manipulation of the previous bit-bit digital. In a processor with the audio feedback process that is also a digital correction for time delay and phase.

Teknologi dan Rekayasa 8. CLASS G Characteristics :  Including analog brace to improve the efficiency of the brace class B / AB  Supply Voltage made step because requires a high voltage

Teknologi dan Rekayasa Brace the concept of class G with a supply voltage multilevel

Teknologi dan Rekayasa 9. CLASS H Characteristics :  Including analog brace to improve the efficiency of the brace class B / AB  Brace similar to the G-class supply voltage that can be changed as needed  Complex but efficient  High-low voltage supply is designed to be more limited linier not only have 2 or 3 phase only  Supply voltage and the voltage output is only a few more high-volt