The phase of terahertz waves can now be precisely modulated electronically using a chip-based digitally coded shifter. achievement is step towards chip-scale integrated technology.

This letter describes an analog phase shifter (PS) able to provide a continuously tunable phase shift up to 180° by using a single all-pass unit cell. The proposed topology is compact and easy to implement, and brings an interesting compromise between phase variation, insertion and return losses. Indeed, for a 7.5:1 tuning ratio of varactor capacitance, a phase shift variation of more than 186°...

Barrel Shifter plays an important role in the data shifting and data rotation. It is having application in many areas. The Barrel Shifter is mainly use for the simplification of the data shifting. The Arithmetic and the Logical Shifters can also be replaced by the Barrel Shifter Because with the rotation of the data it also provide the application the data right, left shifting either arithmetic...

A CMOS frequency-insensitive quadrature phase shifter is presented. Due to operation in current-mode, the proposed circuit provides a wide frequency response, a low supply voltage, low power consumption and electronic controllability. Thus, it is very suitable for use in portable and battery-powered equipments. The feature of the proposed circuit is that it can provide the quadrature signals wi...