Abstract
Abstract With the progress of technology and CMOS process, radar system is widely used in many of today’s electronic devices. A pulsed radar would transmit continuous pulse signals periodically, and detect the object by receiving the echo signals. By the transmit time of the echo signal it takes, radar system yield the position information of the object. Therefore, a timing control unit is very important part for a pulsed radar SoC, since it would directly affect the measurement accuracy including direction and distance. In this work, we would introduce a wide-range Programmable Phase Shifter. This circuit can create a programmable phase shift (i.e. timing delay in other words) to a given 10MHz clock signal. The circuit is designed with following features: (1) The tunable range of phase shift as wide as 100ns. (2) All Digital design and almost implemented by digital standard cells, easy to transport to another process. (3) A calibration scheme using frequency multiplier/divider to get a fine shifted phase.