Recently, a digital baseband receiver called zerointermediate frequency zero-crossing demodulator (ZIFZCD) was developed for digital FM signal detection. ZIFZCD is applicable to many worldwide mobile and personal communications systems. In addition, ZIFZCD offers lower power consumption and simpler implementation, compared to the conventional analog implementation [e.g., a limiter-discriminator...

A statistical approach to behavioral modeling for assessing dynamic metrological performance during the concept design of accurate digitizers is proposed. A surface-response approach based on statistical experiment design is exploited for avoiding unrealistic hypothesis of linearity, optimizing simulation, exploring operating conditions systematically, as well as verifying identification and va...

Quantization noise levels of two low-sensitive allpass filter structures, namely wave digital circulator filters (WDCF) and lossless digital integrator filters (LDIF), are compared. Allpass filters are of interest for design of lowpass and bandpass lattice filters. The results show, primarily, that second-order LDIFs have lower total quantization noise gains than corresponding WCDFs for any pol...

A novel project is being presented here for implementation an auto ranging analog to digital converter for biomedical applications completely inside an FPGA i.e. an all-digital analog to digital (A/D) converter system. The only analog part is the auto ranging circuitry and an RC Integrator outside FPGA. The system outputs 24 bits and features a sigma delta ADC of 16 bits resolution, a range det...

Transmission electron microscopy imaging protocols required by structural scientists vary widely and can be laborious without tailor-made applications. We present here the jeol automated microscopy expert system (james) api integrator, a programming library for computer control of transmission electron microscopy operations and equipment. james has been implemented on JEOL microscopes with Gata...

The era of computer simulations (CS) started with the development of the first digital computers in ‘40s and ’50s (for example, MANIAC (stands for “Mathematical and Numerical Integrator and Computer) computer in Los Alamos). First Molecular Dynamics simulations were reported in 1956. Now CS are the standard tool for studying diverse set of problems. The need in CS arises because very few proble...

A two-channel time-interleaved second-order sigma-delta modulator for broadband applications including asymmetrical digital subscriber line (ADSL) is presented. The proposed two-channel modulator uses a single integrator channel which does not require additional active elements for the quantizer input generation, since the integrator outputs are directly used as the input of the quantizers. As ...

Voltage-controlled oscillator (VCO) based ADCs have become a topic of great interest due to the unique and attractive signal-processing properties they offer in the design of oversampling converters. Assuming a ring-oscillator structure, the outputs of a VCO toggle between two discrete levels (VDD and GND) like a CMOS digital gate, enabling simple multibit quantization using Dflip-flops. Since ...