Circuit for phase locked oscillators

US8049567B2 · kind B2 · utility

Inventors

• Johan Persson · Malmö, SE
• Yan Zhou · Solna, SE
• Johan Akerman · Sollentuna, SE

Key dates

• Filing date: Oct 31, 2008
• Grant date: Nov 1, 2011
• Expiry date: Jun 21, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1107
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A circuit comprising a DC current source and at least two spin torque oscillators, the at least two spin torque oscillators being electrically coupled to each other and to the DC current source. A circuit comprising phase shifting means is connected in such a way as to cause a phase shift between current and voltage through the spin torque oscillators. An advantage is that the controlled phase shift significantly increases the tolerance for deviating anisotropy fields, which makes manufacturing of spin torque oscillator devices much more feasible in practice.