Radio-Frequency Circuits > Conclusion

Conclusion

In this chapter, we described in the first part the role of on-chip inductor for resonant circuits. Then, we detailed the power amplifiers and the associated notions of power efficiency and amplifier class. Thirdly, we presented some circuits used to generate oscillations, based on ring oscillation and passive LC networks. Next, we described the main parts of the phase lock loop and illustrated three applications in the GHz range. The frequency conversion was presented through the addition of sinusoidal waveforms in non-linear devices. We also presented the Gilbert mixer and looked at the frequency conversion performances in frequency domain thanks to the Fourier Transform. Finally, the sub-sampling principles were applied to frequency down conversion through a simple example.