Inventors:
- Montrouge, FR
Andreas Kaiser - Villeneuve D'ascq, FR
Ullrich Pfeiffer - Wuppertal, DE
Andreia Cathelin - Laval, FR
Janusz Grzyb - Hilden, DE
Yan Zhao - Los Angeles CA, US
Assignee:
STMicroelectronics SA - Montrouge
International Classification:
H03K 3/03
Abstract:
A frequency oscillator includes a ring oscillator having N inverters coupled in series, where N is an odd integer equal to three or more. A first filter is coupled between an output node of a first of the inverters and an output line of the frequency oscillator. A second filter is coupled between an output node of a second of the inverters and the output line of the frequency oscillator.