3 edition of A pulsed high frequency phase detector with an output integrating circuit found in the catalog.
by Massachusetts Institute of Technology
Written in English
The present invention relates to a phase-locked loop (PLL) circuit and, more particularly to a PLL with a phase lock detection circuit. The PLL circuit includes a phase detector, a charge pump, a loop filter, a voltage controlled oscillator (VCO), a frequency divider, and a phase lock detection circuit having two current charging/discharging circuits with first and second Cited by: Figure 1: A phase locked loop consists of a voltage controlled oscillator (VCO), frequency divider, phase detector (PD), charge pump (CP) and lead-lag loop ﬁlter; the VCO’s output frequency F out is set to a multiple of the reference oscillators frequency r ef depending on the divider ratios (N & R).
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS—I: REGULAR PAPERS, VOL. 60, NO. 3, MARCH Analysis of Phase Noise in Phase/Frequency Detectors Aliakbar Homayoun, Student Member, IEEE, and Behzad Razavi, Fellow, IEEE Abstract—The phase noise of phase/frequency detectors can sig-niﬁcantly raise the in-band phase noise of frequency File Size: 2MB. Low Frequency. This circuit has limitations. The rectifier’s speed is limited by the op amp bandwidth. This effect is illustrated in Figure 9, where the rectified output signal overlaps the input signal. The maximum frequency that can be rectified is determined by the slew rate of the op amp. FIGURE 9: Output Limitation on High-Frequency.
Due to the very high level of saturated switching, the pulse width broadens from about 20 ns to 40 ns. The output pulse is also more symmetrical than the input pulse: To verify the high emitted optical power from the LED under a drive current of mA, the detector with an active area diameter of 1mm was moved 35 mm from the LED emitting source. Consider what happens when one input lags the other by cycles. The output will be active for of a cycle, per cycle. In other words, the output will be active with a duty cycle of the phase difference in cycles. If your output logic switches 5v, then the output gain is 5v per cycle, about v per radian.
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ORD, COPT 'O^^T From: Commanding Officer, Naval Training Schools. To: Superintendent, U. S» Naval Postgraduate School. Subj: Thesis entitled "A Pulsed High-Frequency Phase ^'^^ Detector with an Output Integrating Circuit", prepared by LCDR William Richard Kurtz as a partial fulfillment for the requirements of a Master's degree.
Enter the password to open this PDF file: Cancel OK. File name:. Not believed to be a CIVINS (Civilian Institutions) basic principles of phase detectors and pulse integrating circuits have been understood for many years.
Most of the developmental work done on phase detectors has been concentrated on circuits designed to operate at audio or power : William Richard Kurtz. The phase-locked loop (PLL) is an interesting device. As shown in Figureit consists of a phase detector, VCO, and low-pass comprises a servo loop, where the VCO is phase-locked to the input signal and oscillates at the same frequency.
If there is a phase or frequency difference between the two sources, the phase detector produces an output that is used to. General Description. The MAX/MAX are high-speed PECL/ECL phase-frequency detectors designed for use in high- bandwidth phase-locked loop (PLL) applications. The devices compare a single-ended reference (R) and a VCO (V) input and produce pulse streams on differen- tial up (U) and down (D) outputs.
Tri-state phase/frequency detector used in conjunction with charge pump-phase/frequency detector. The functionality of the PFD can be illustrated via a state machine as shown in Figure . For example, the PFD output “Up” is high when the rising edge of the reference leads that of the divided VCO output.
8 CDB Phase-Locked Loop: A Versatile Building Block for Micropower Digital and Analog Applications Phase Comparator II Output (Terminal 13) Phase Pulse (Terminal 1) NOTE A: Dashed line is an open-circuit condition. 92CSR1 Signal Input (Terminal 14) VCO Output (Terminal 4) = Comparator Input (Terminal 3) VCO Input (Terminal 9) = LPF.
MCH, MCK Phase-Frequency Detector Description The MCH/K is a phase frequency−detector intended for phase−locked loop applications which require a minimum amount of phase and frequency difference at lock.
When used in conjunction with high performance VCO such as the MCEL, a high bandwidth PLL can be realized. case), each pulse starts with the same phase. Systems, which inherently maintain a high level of phase coherence from pulse to pulse, are termed fully coherent.
Note that phase coherence is maintained even if the PRF and RF are not locked together (provided the RF source is phase stable). As stated, it is common practice to lock the PRF to. Prof. David Jenn Department of Electrical & Computer Engineering Dyer Road, Room Monterey, CA () [email protected], [email protected] Chapter 5 Design of Phase Detection & Filter Using 45nm VLSI Technology 71 CHAPTER 5 DESIGN OF PHASE DETECTOR & FILTER USING 45 NM VLSI TECHNOLOGY The first block of Phase Locked Loop is the phase detector.
This is a nonlinear device whose output contains the phase difference between the two oscillating input signals. DIGITAL PHASE DETECTORS WITH A PARALLEL OUTPUT All of the phase detectors so far had only a 1-bit or analog output.
Flip-flop Counter PD This phase detector counts the number of high-frequency clock periods between the phase difference of v1 and v2’. v1 v2' t t t t ≈θe Q N Content Fig.
S R Flip-Flop Q Enable Clock Counter Reset High File Size: KB. devices for phase detection are presented, and the variety of different characteristics are studied.
Some have a simple topology, others operate at high frequency, and still others have a very low content of undesirable signals in their output. Mixers, exclusive-OR gates, RS latches, flip-flops, and phase/frequency detectors are pre-sented.
The MAX/MAX are high-speed PECL/ECL phase-frequency detectors designed for use in high-bandwidth phase-locked loop (PLL) applications. The devices compare a single-ended reference (R) and a VCO (V) input and produce pulse streams on differential up (U) and down (D) outputs.
A phase detector was designed using a double-balanced mixer with the RF input signals passing through an ultra-fast comparator before the mixer. Analog Devices’ ADCMP ultra-fast comparator was selected for testing of a high-frequency phase detector due to its very short propagation delay ( picoseconds) .
IntroductionFile Size: KB. A phase detector or phase comparator is a frequency mixer, analog multiplier or logic circuit that generates a voltage signal which represents the difference in phase between two signal inputs.
It is an essential element of the phase-locked loop. Detecting phase difference is very important in many applications, such as motor control, radar and telecommunication. • High Open Loop Gain: 85 dB for video and high speed signal processing • High Output Current: mA applications such as HDSL and pulse amplifiers.
With mA output current, the LM can be used for • Differential Gain and Phase: %, ° video distribution, as a transformer driver or as aFile Size: 2MB. once it has captured the input signal. This can be limited either by the phase detector or the VCO frequency range.
If limited by phase detector: 0 phase detector type shown (Gilbert multiplier or mixer), the voltage vs. phase slope reverses outside this π/2 π φ K Dπ/2-K. For an RC integrator circuit, the input signal is applied to the resistance with the output taken across the capacitor, then V OUT equals V the capacitor is a frequency dependant element, the amount of charge that is established across the.
Phase frequency detector (PFD) is used as basic component for designing phase locked loop. Phase Locked Loops (PLL) has a negative feedback control system circuit. There is an increasing demand for a high frequency operation and low jitter PLL.A common architecture for clock generation uses a phase frequency detector (PFD) for.
As soon as the incoming signal is received (LOS = 0) and a phase mismatch is detected, the loop goes after it with the maximum speed.
The maximum (or minimum) speed ω max of e-9 rad/sec (or ω min of e-9 rad/sec) of the VCO correspond to the high (or to the low) output of the phase detector.
(Remark: in this example the transition density is constant and .• The only digital block is the phase detector and the remaining blocks are similar to the LPLL • The divide by N counter is used in frequency synthesizer Size: KB.
The phase detector will sense the difference, and the output signal will control the VCO to increase the frequency until the phases are aligned. By definition, when the PLL is in phase lock, the frequencies are the same. The same operation applies for when the output frequency is at a lower frequency than the reference signal.