Jin-Su Ko, Jeong-Keun Kim, B. Ko, Dong-Bin Cheon, Sang-Oh Lee, Byeong-ha Park
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引用次数: 4
Abstract
It is demonstrated that the gain of an amplifier with a large transistor cannot be controlled by bias current but can be controlled effectively by varying the effective emitter inductance. A simple method to control the gain of a driver amplifier is suggested and implemented. The measured gain variation is not less than 6 dB. However, that measured by the conventional method is only 0.5 dB. Using this gain control scheme, a class AB driver amplifier is designed for a PCS handheld phone.
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