| 摘要 |
The invention relates to a new family of differential oscillators based on oscillator amplifiers with local feedback forming respective local feedback systems, and at least one common link interconnecting the local feedback systems. Each branch of the differential oscillator includes an oscillator amplifier with a phase shifting and impedance transforming local feedback path from the output to the input of the amplifier to form a local feedback system. The differential oscillator also includes one or more common phase shifting links for interconnecting and cooperating with the local feedback systems to enable self-sustained differential oscillation. In differential mode operation, the electrical midpoint of the common phase shifting link(s) is virtually grounded and the local feedback systems of the two branches operate, together with the common phase shifting link(s), effectively in anti-phase with respect to each other as two separate oscillators. |
