| 摘要 |
<p>Techniques for generating quadrature signals from a local oscillator signal, wherein the generated quadrature signals have a frequency half of the local oscillator frequency. In an exemplary embodiment, two oscillators, e.g., injection locked oscillators, are provided, each oscillator having a load, a cross-coupled transistor pair, an integrating capacitor, and current injection transistors. A differential pair is coupled to the leads of each of the integrating capacitors, and the drains of the differential pair are coupled to the outputs of the other oscillator to help increase the slew rate of the output voltages of the other oscillator. The inputs to the differential pair may be first amplified to improve the gain of the differential pair. In another exemplary embodiment, the power consumption of the differential pair may be reduced by operating them in a discontinuous mode, e.g., by coupling the source voltages of the differential pair to corresponding delayed versions of the drain voltages.</p> |
