Integrated VCOs for Medical Implant Transceivers

Table 1

Comparison table for the three oscillator architectures.

VCO type	Current consumption	Die area	Phase noise @ 160 kHz offset	Linearity	Frequency stability	Supply noise sensitivity
Ring	0.74 mA	0.2 mm $\times$ 0.2 mm	−77 dBc/Hz	Good	Poor	Sensitive
LC-tank divided	2.20 mA	0.4 mm $\times$ 0.7 mm	−97 dBc/Hz	Moderate	Good	Immune
LC-tank with PF	1.25 mA	0.6 mm $\times$ 0.8 mm	−98  dBc/Hz	Moderate	Good	Immune