Switched-current sinusoidal oscillators-single phase and multiphase

Circuit designs of sinusoidal switched-current oscillators (SIOs) both sing le phase and multiphase are presented. First, a novel SIO is proposed. This SIO features simpler configuration and hence fewer transistors and connect ions, and faster building up of stable oscillation amplitude than those pro posed in earlier works. Then, new design schemes of multiple-phase sinusoid al SIOs are introduced. Both even and odd phase SIOs can be implemented usi ng the schemes described. Finally, cascode techniques, (SI)-I-2 memory cell , dummy switches and balanced structure are applied to our SIOs to get high precision SIOs. The circuit operations of all SIO proposed have been valid ated by transistor level SPICE simulations.