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Noise Analysis Adjustable Bootstrap Transimpedance and Voltage Feedback Receiver Amplifier

Keywords: thermal noise , shot noise , Ambient noise

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Abstract:

An understanding of the noise is required for a receivers performance to be precisely characterized. The amount of noise present in a receiver will be the primary factor that determines the receivers sensitivity. In this study, the definition of noise in infrared communication is discussed to demonstrate the effects of receiver noise on performance for adjustable bootstrap transimpedance and voltage feedback receiver amplifier. The noise sources that are commonly found in an optical wireless receiver are then discussed, including noises that are of optical as well as of electrical origin. The equivalent circuit model that will describe the noise performance of the bootstrap transimpedance and voltage feedback amplifier circuit shows, that the input noise current density is flat 380 pV/ from 1 Hz to 10 GHz and starts to increase. The output noise density, shows a flatness of 1.1nV/ from 1 Hz to 80 MHZ when it starts descending according to the capacitor value which adjust the bandwidth. Results also showed that the output noise density remains constant during the bandwidth adjustment process.

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