Ring oscillator with two inverters per unit inverter circuit
US5703541A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Mar 20, 1997 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Mar 20, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0322
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A ring oscillator shortens the delay time between consecutive delayed clock signals, and increases of the number of delayed clock signals, without changing the oscillation frequency f of the ring oscillator and the number of stages n of inverter in one loop, and holding the same control current/osclllation frequency. The ring oscillator has odd numbers of unit inverters, wherein the unit inverter comprises two serial circuits connected in parallel each comprising of P channel transistor and N channel transistor, constant current sources connected to P channel and N channel sides in these parallel circuits, respectively, which are controlled by a current control circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.