Systems for analog phase shifting

摘要

A system for phase shifting that produces an output signal by modifying a phase of an input signal, including a primary phase shifting stage that modifies the input signal phase in increments set by a first tuning resolution; a secondary phase shifting stage that modifies the input signal phase in increments set by a second tuning resolution; and, a tuning circuit that controls the primary phase shifting stage and the secondary phase shifting stage according to control input.

主权项

1. A system for phase shifting comprising:
a first switch that couples a first switch input to a common rail only when the first switch is closed; a first sub-circuit, comprising a first capacitor and a first inductor; wherein the first inductor couples a signal input of the system to the first switch; wherein the first capacitor couples the first switch input and the first inductor to the common rail; wherein the first sub-circuit includes only a single inductor and a single capacitor; a second switch that couples a second switch input to the common rail only when the second switch is closed; a second sub-circuit, comprising a second capacitor and a second inductor; wherein the second capacitor couples the signal input of the system to the second switch; wherein the second inductor couples the second switch input and the second capacitor to the common rail; wherein the second sub-circuit includes only a single inductor and a single capacitor; and a third switch that couples a signal output of the system to the first sub-circuit when in a first switch state and couples the output of the system to the second sub-circuit when in a second switch state; wherein the system phase shifts the signal output relative to the signal input.