Oscillator with stacked amplifier
US7391278B2 · kind B2 · utility
4Cited by
3References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 2006 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Aug 31, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/42
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Embodiments of the invention provide a low-power, high-gain amplifier for a crystal oscillator. In some embodiments, the oscillator amplifier circuit comprises two NMOS transistors stacked in series with a PMOS transistor. In various embodiments, each of the NMOS transistors is diode-connected through a resistor and has the input signal capacitively coupled onto its control terminal. The stacked amplifier raises the DC level of the amplified oscillatory signal and can support a substantial oscillation amplitude without clipping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.