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- W1838878025 abstract "The purpose of frequency compensation in amplifiers is to equalize the input impedance of a transistor so that the matching element can look into a relatively constant R and Z over a given bandwidth. Frequency compensation in narrowband designs, using L and C matching elements, is not often used or required because the bandwidth is limited to 5% or 10% by the matching element. Another impedance compensation and gain-leveling method with advantages and disadvantages over LCR networks is known as negative feedback. Transistor input impedance is high at low frequencies and low and more reactive at high frequencies. Input, output impedances in complex form are usually given in RF device data sheets. The advantages of negative feedback include simplicity and a stabilizing effect on the amplifier. The only disadvantage is that power is being dissipated in the feedback network, which lowers the overall efficiency of the system. The amount of power loss depends on the amount of gain reduction desired at low frequencies, that is, the amount of feedback. If the loss of efficiency with negative feedback is not acceptable in an application, a combination of the RLC compensation technique and negative feedback usually yields excellent results." @default.
- W1838878025 created "2016-06-24" @default.
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- W1838878025 date "2001-01-01" @default.
- W1838878025 modified "2023-09-24" @default.
- W1838878025 title "Frequency Compensation and Negative Feedback" @default.
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- W1838878025 doi "https://doi.org/10.1016/b978-075067281-8/50030-8" @default.
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