A GaAs Monolithic Sampling Phase Frequency Comparator for Extending the Pull-In Range of Microwave Phase-Locked Oscillators

Tadao NAKAGAWA  Tetsuo HIROTA  Takashi OHIRA  

IEICE TRANSACTIONS on Electronics   Vol.E76-C   No.6   pp.944-949
Publication Date: 1993/06/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Technology for Advanced Functions and Size-Reductions)
sampling,  phase frequency comparator,  MMIC,  Ku-band,  pull-in range,  

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A novel sampling comparator circuit is presented for extending the pull-in range of microwave phase-locked oscillators (PLOs). It performs both phase and frequency detection without any frequency dividers, and a GaAs MMIC prototype is developed and tested. The proposed comparator improves the pull-in range by about 10 times more than is possible with conventional sampling phase detectors.