Adjustable Phase, Discrete Time Sinewave Generator

1. Direct Form Structure with single output and the impulse response as 0 sin( ) n or 0 cos( ) n [1] 2. Coupled-form Structure with double outputs with the impulse response as 0 sin( ) n and 0 cos( ) n [1,2] After making an assessment on the output from both sets of digital sine generator structure, the researchers found that both sets of structure cannot generate digital sine wave with phase shift according to the users’ demands. Direct form structure will generate only single output while couple form structure will generate double output with phase difference of 90 since one output is 0 sin( ) n while the other output is 0 cos( ) n Therefore, the new digital sin oscillator that can change the phase shift according to the user’s demands will be introduced. The discrete time system with the result as 0 cos( ) n will be used for the design and then the system will be cascaded with another discrete time system to change the zero position on the real axis. This will make output response of cascaded discrete time system will have a phase shift after comparing with