Title: Part No. 2SC4793
Introduction:
Most commonly used radio frequency power amplifier (rf power amplifier) is a kind of electronic amplifier that transforms a low-power radio frequency signal into a higher power signal. Usually, rf power amplifiers drive the antenna of a transmitter. Design goals frequently include gain, power output, bandwidth, power efficiency, linearity (low signal density at rated output), input and output impedance matching, and heat intemperance.
Features:
Power gain is very high
Package is convenient for mounting
Emitter ballasted construction for good presentation and high reliability
Infinite loads withstand VSWR at normal operating circumstances.
Working:
An RF amplifier is a tuned amplifier that allows the input signal of transmit or communicated data to control an output signal. The RF amplifier uses frequency-limiting networks to transform the input signal into an output signal that will deliver the requisite response at a given frequency.A common trade-off in power amplifier layout is the trade-off between efficiency and linearity. The previously named classes become more effective, but less linear, in the order they are listed. Operating the active device as a switch result in higher efficiency, hypothetically up to 100%, but lower linearity. Along With the switch-mode classes are class D, class F and class E. The class D amplifier is not frequently used in rf applications since the finite switching speed of the active devices and potential charge storage in saturation could lead to a large I-V product, which weakens efficiency.
Applications:
10 to 14 watts application of amplifiers in HF bands.
High current medium power switches
Specially in RF and AF Switches
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