Abstract — We present an injection-locked divider (ILFD) with a double-balanced structure to generate two signals with tunable phase difference. A circuit prototype was designed and fabricated using a standard 0.18 ¡ m digital CMOS technology, and generates dual-phase signals at 4.8-6 GHz. The phase difference of the two output signals can be tuned independently by 55 ¢ , and differentially by 100 ¢ , both centered around quadrature (90 ¢). The phase noise degradation is negligible. Index Terms — frequency conversion, injection locked oscillators, phase matching, phase noise, signal generator I
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