VCO Gain and Injection-Locking to Measure Inductor Coupling on ICs
Using Oscillator Gain and Injection-Locking to Measure On-Chip Inductor Coupling
Seiten
2010
LAP Lambert Acad. Publ. (Verlag)
978-3-8433-6701-1 (ISBN)
LAP Lambert Acad. Publ. (Verlag)
978-3-8433-6701-1 (ISBN)
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The theoretical behavior of oscillators is explored using the gm model. Mathematical derivations based on the model show that the frequency response of an LC oscillator resembles that of a high-Q bandpass filter with exceptionally high, but finite, pass-band gain. The linear derivations predict a 20 dB/decade roll-off beyond the loaded 3 dB corner frequency which is consistent with the accepted phase noise model of the oscillator. The demonstrated oscillator gain shows how oscillators can be used in non-traditional roles such as active filters or amplifiers. As an oscillator has gain within a determinable bandwidth and an injection-locked oscillator has the same output power as an identical oscillator operated free-running, on-chip inductor coupling can easily be measured using oscillators. The design, implementation, and measurements of a unique experimental test chip and PCB for measuring on-chip inductor coupling easily and accurately are presented. The experiment requires no calibration, matching, or probe de-embedding and makes use of an injection-locked bipolar oscillator acting as a transmitter and a free-running bipolar oscillator behaving as a receiver.
Sprache | englisch |
---|---|
Maße | 150 x 220 mm |
Gewicht | 219 g |
Themenwelt | Technik ► Elektrotechnik / Energietechnik |
Schlagworte | Design |
ISBN-10 | 3-8433-6701-9 / 3843367019 |
ISBN-13 | 978-3-8433-6701-1 / 9783843367011 |
Zustand | Neuware |
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