A Wide Tuning-Range CMOS VCO with a Tunable Active Inductor

Table 1

Comparison of VCO circuit performance: published and this work.

	Unit	This work	[7]	[8]	[9]	[13]	[14]	[15]	[16]
Tuning range	GHz	0.6~7.2	3.2~5.3	3.3~5.1	1.1~1.9	1.1~2.7	0.5~2	0.5~3	1.3~2.2
	%	169	47.7	41.1	51	81	120	143	47.5
KVCO	MHz/V	5,000	167~555	50~85	667	3,850	500	2,500	458
	dBm	−3.89~−11.1	−4.8	−7	—	−14.28	−21~−29	−14~−22	−9~−16
PN at 1 MHz offset	dBc/Hz	−86~−110	−115.6	−123.14	−126	−83~−92	−78~−90	−101~−118	−82~−86
Area	mm^2	0.51	0.828	0.24	0.5	0.4	0.09	0.45	—
Architecture		TAI	Switched-cap.	Switched-cap.	Switched-ind.	TAI	TAI	TAI	TAI

Simulated results.