منابع مشابه
Design and Simulation of a Modified 32-bit ROM-based Direct Digital Frequency Synthesizer on FPGA
This paper presents a modified 32-bit ROM-based Direct Digital Frequency Synthesizer (DDFS). Maximum output frequency of the DDFS is limited by the structure of the accumulator used in the DDFS architecture. The hierarchical pipeline accumulator (HPA) presented in this paper has less propagation delay time rather than the conventional structures. Therefore, it results in both higher maximum ope...
متن کاملdesign and simulation of a modified 32-bit rom-based direct digital frequency synthesizer on fpga
this paper presents a modified 32-bit rom-based direct digital frequency synthesizer (ddfs). maximum output frequency of the ddfs is limited by the structure of the accumulator used in the ddfs architecture. the hierarchical pipeline accumulator (hpa) presented in this paper has less propagation delay time rather than the conventional structures. therefore, it results in both higher maximum ope...
متن کامل2.32 THz quantum cascade laser frequency-locked to the harmonic of a microwave synthesizer source.
Frequency stabilization of a THz quantum cascade laser (QCL) to the harmonic of a microwave source has been accomplished using a Schottky diode waveguide mixer designed for harmonic mixing. The 2.32 THz, 1.0 milliwatt CW QCL is coupled into the signal port of the mixer and a 110 GHz signal, derived from a harmonic of a microwave synthesizer, is coupled into the IF port. The difference frequency...
متن کاملFrequency stabilization of an optically pumped far-infrared laser to the harmonic of a microwave synthesizer.
Measurements of the frequency stability of a far-infrared molecular laser have been made by mixing the harmonic of an ultrastable microwave source with a portion of the laser output signal in a terahertz (THz) Schottky diode balanced mixer. A 3 GHz difference-frequency signal was used in a frequency discriminator circuit to lock the laser to the microwave source. Comparisons of the short- and l...
متن کاملAnalytical Model and Behavioral Simulation Approach for a Fractional-N Synthesizer Employing a Sample-Hold Element
A previously unknown intrinsic nonlinearity of standard fractionalsynthesizers is identified. A general analytical model for fractionalphased-locked loops (PLLs) that includes the effect of the nonlinearity is derived and an improvement to the synthesizer topology is discussed. Also, a new methodology for behavioral simulation is presented: the proposed methodology is based on an object-oriente...
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ژورنال
عنوان ژورنال: Journal of the Franklin Institute
سال: 1916
ISSN: 0016-0032
DOI: 10.1016/s0016-0032(16)90114-5