The phase detector provides the phase difference between a digital data signal and a clock signal, using respective clock-controlled memories (SP1,SP2) in 2 data signal paths, at least one of their data outputs (Q2) coupled to a further memory (SP4), controlled by a clock signal which is...
when the op amp is connected to the output of the phase detector, this voltage can improperly bias the diodes in the phase detector and cause an unbalance in the diode circuit.
A sample-and-hold phase detector comprises a first charge/discharge circuit for charging a first storage capacitor with a constant current for a duration corresponding to a phase difference between an input pulse and a reference pulse and discharging it after it is sampled. A first sample-and-ho...
PLL power up detector includes a capacitor coupled to a charging circuit. The capacitor is charged to a level responsive to the pulse width of the UP and DOWN signals produced by the PFD circuit included in the PLL circuit. When the PLL is near or at the locked state, the UP and DOWN...
A phase-locked loop (Figure 1) is a feedback system in which a phase comparator or detector drives a VCO in a feedback loop to make the oscillator frequency (or phase) accurately track that of an applied reference frequency. A filter circuit is typically required to integrate and smooth th...
A novel 1/4-rate clock phase detector (PD) structure for phase locked loop (PLL)-based clock and data recovery (CDR) is proposed. In this topology, the retimed data is generated within the circuit and no extra circuit is required. Furthermore, the error and reference signals are independen...
PURPOSE:To find easily a phase current by approximation by detecting line currents of respective phases by line current detectors and performing arithmetic by a line current-phase current converting circuit according to a specific equation. CONSTITUTION:The line currents (a), (b), and (c) of the...
If implemented in a product, a lock acquisition circuit is needed. This was not demonstrated. VTUNE needs to be “precharged” to steer the VCO frequency close enough to the reference so that lock can be captured. In Figure 19, the measured phase noise results were impressive using the HMC...
If implemented in a product, a lock acquisition circuit is needed. This was not demonstrated. VTUNE needs to be “precharged” to steer the VCO frequency close enough to the reference so that lock can be captured. In Figure 19, the measured phase noise results were impressive using the HMC...
using AMICS, interactively analysed using SEM-EDS and finally 3D-imaged using Micro X-CT. This same sample was also used for the LA-ICP-MS analysis. In total, 2700 angle step projection images were taken during the scan. For each angle, the detector waited a single exposure time and then...