A 5 GHz quadrature relaxation oscillator with mixing for improved testability or compact front-end implementation

作者：Oliveira Luis Bica^*; van den Bos Chris; Fernandes Jorge R; Verhoeven Chris J M; Silva Manuel M

来源：International Journal of Circuit Theory and Applications, 2010, 38(4): 359-366.

DOI：10.1002/cta.562

• quadrature oscillator
• relaxation oscillator
• mixer
• quadrature error measurement
• low-IF receivers

We demonstrate by measurements on a test circuit that a 5 GHz relaxation oscillator with accurate quadrature outputs and low phase-noise can be obtained, and that these favorable properties can be preserved while the mixing function is performed by this oscillator. This is useful either to measure the quadrature error at a low frequency, or to implement a low-intermediate frequency (IF) or zero-IF (homodyne) radio frequency front-end.

• 出版日期2010-5