Distortion Parameters - Part I — Lesson 1

This lesson covers the distortion parameters. It delves into the effects of different parameters such as LO leakage, DC offset, and IQ imbalance on various transmitter and receiver topologies. The lesson also discusses inherent noise in semiconductor devices, flicker noise, and the impact of noise on different signal profiles. It further explains the concept of converter noise and how it affects the overall system noise. The lesson concludes with an in-depth explanation of noise in oscillators, specifically phase noise and phase jitter, and their impact on the signal-to-noise ratio (SNR).

Video Highlights

00:18 - Distortion introducing elements and flicker noise
03:26 - Flicker noise on different types of signals
07:23 - Concept of converter noise in heterodyne structure
12:45 - Noise factor and noise figure in a system
18:08 - Calculation of noise factor and noise figure for a given system
22:27 - Noise from the oscillators
29:01 - Discussion on the required phase jitter for a 100-megahertz signal to use a 12-bit converter

Key Takeaways

- Distortion parameters like LO leakage, DC offset, and IQ imbalance have different effects on various transmitter and receiver topologies.
- Inherent noise in semiconductor devices, also known as flicker noise, impacts the early stage of frequency.
- Converter noise, which arises from the IF stage of up or down conversion of frequency, affects the overall system noise.
- Noise in oscillators, specifically phase noise and phase jitter, impacts the signal-to-noise ratio (SNR).
- The noise factor of a system is mostly impacted by the first and second stages of the system.