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A new current-regenerative Schmitt trigger is proposed and its characteristics are quantified both analytically and numerically. The center and width of the hysteresis of the proposed Schmitt trigger can be tuned. The low-impedance of the critical nodes of the Schmitt trigger enables it to operate at high frequencies. The proposed Schmitt trigger has been designed in TSMC-0.18 mum 1.8 V CMOS technology...
This paper proposes a new remote frequency calibration method that allows a passive wireless microsensor to adjust the oscillation frequency of its local oscillator using a calibrating reference signal sent by its reader. The reference signal is transmitted wirelessly by the reader in the form of a modulated tone. Frequency calibration is achieved by employing an injection-locking phase-locked loop...
This paper proposes a new current-integrating bang-bang phase detector that is insensitive to data transient disturbances. The phase detector extracts early-late phase information between the input and retimed data by integrating the input data and its complementary on two identical capacitors. In addition, it employs only one regenerative DFF for phase detection, significantly lowering hardware cost...
This paper introduces active transformer current- mode phase-locked loops (PLLs). The proposed PLLs replaces the RC loop filter of voltage-mode PLLs with an active transformer loop filter to take the advantage of their large inductance and small silicon area. A current-controlled LC oscillator with active inductors is employed to further reduce silicon area. The sensitivity of the cutoff frequency...
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