| 摘要 |
Various circuits are described, which sustain an oscillation using a combination of four primary inverters, four feedforward inverters, and four coupling resistors for outputting a quadrature output signal while avoiding contention between a primary inverter and a feedforward inverter. In one configuration, a circuit includes four primary inverters configured in a ring topology, four coupling resistors uniformly interposed in the ring among the four primary inverters, and four feedforward inverters forming four sub-feedback loops, respectively, each sub-feedback loop comprising two primary inverters, one coupling resistor, and one feedforward inverter. In a further embodiment, the circuit further comprises a voltage-to-current converter is for receiving a control voltage and outputting a supply current to the four primary inverters and the four feedforward inverters. A corresponding method is also provided. |
| 主权项 |
1. A circuit comprising:
four primary inverters configured in a ring topology; four coupling resistors uniformly disposed in the ring among the four primary inverters, wherein a coupling resistor is interposed between each successive primary inverter; and four feedforward inverters forming four sub-feedback loops, respectively, each comprising two primary inverters, one coupling resistor, and one feedforward inverter, wherein each end of each of the four coupling resistors shares a connection with one of the four primary inverters and one of the four feedforward inverters. |
