High-linearity multi-bit phase interpolator

The invention discloses a high-linearity multi-bit phase interpolator which comprises a quadrature phase generator and two kinds of included angle generators. The quadrature phase generator comprises a first output end and a second output end which respectively output two paths of adjacent quadrature signals, the two output ends are respectively connected to the two input ends of the two kinds of included angle generators, and the output ends of the first-class included angle generator and the second-class included angle generator are directly connected or cascaded and then connected with the last-stage included angle generator. The last-stage included angle generator is one of the two kinds of included angle generators and outputs a phase shifting signal. The phase shift circuit has a 360-degree phase shift function, accurately realizes phase shift, is high in linearity and precision, simple in circuit structure, and flexible and controllable in phase shift stepping and digit, can effectively reduce phase no