Built in Direct Digital Frequency Synthesizer
نویسندگان
چکیده
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 کاملAnalog Circuit Testing Using Built-In Direct-Digital Synthesis
Linearity is an important measure of an analog amplifier performance and normally measured by the 3rd order inter-modulation product (IP3) under a two-tone test. In this paper, we propose a test scheme that generates test tones using a built-in direct-digital synthesizer (DDS). Radio Frequency (RF) test tones are generated by converting the DDS output to RF using a built-in analog mixer that ca...
متن کاملA programmable digital frequency synthesizer for a high resolution nmr spectrometer
2014 A low-cost filterless multi-signal frequency and phase synthesizer based on digital techniques is described. Usual functions such as frequency, phase selection and modulation are direct TTL programmable. Although it is built primarily for NMR field stabilisation, homonuclear spin decoupling and resonance line observation purposes, other applications in the frequency phase domain can also b...
متن کاملA Wideband Frequency Synthesizer for Built-in Self Testing of Analog Integrated Circuits
A Wideband Frequency Synthesizer for Built-in Self Testing of Analog Integrated Circuits. (August 2004) Wenjian Yan, B.S., Texas A&M University Chair of Advisory Committee: Dr. Jose Silva-Martinez The cost to test chips has risen tremendously. Additionally, the process for testing all functionalities of both analog and digital part is far from simple. One attractive option is moving some or all...
متن کاملDesign of a ROM-Less Direct Digital Frequency Synthesizer on FPGA
DDFS (Direct Digital Frequency Synthesizer) is a new technique of frequency synthesizes which introduces the advanced digital processing theory into frequency synthesis. A direct digital frequency synthesizer is composed of a phase accumulator, an adder, an ROM for wave pattern saving, a D/A converter and a LPF (low pass filter). With the rapid development of VLSI, the speed of algorithm is req...
متن کامل