This paper introduces the concept of frequency-translating, bandpass delta-sigma modulator in continuous-time. The system level design and simulation results of the deltasigma modulator are presented. The DAC jitter performance of the continuous-time, frequency translating bandpass delta-sigma modulator is presented. The DAC jitter performance of the frequency translating modulator and conventi...

This paper describes a digital realization of a click modulator for a class-D digital audio power amplifier. The click modulator is an interesting alternative to a classical pulse width modulator. The modulator was realized using a floating point digital signal processor ADSP21065L and FPGA circuit Spartan 3 XC3100E. Some simulation and laboratory test results are presented in this paper. Stres...

The work deals with the design of the 12-bit Delta-Sigma () modulator using switched capacitors (SC) technique. The modulator serves to vibration sensor output processing. The first part describes the modulator parameters definition. Results of the proposed topology ideal model were presented as well. Next, the  modulator circuitry on the transistor level was done. The ONSemiconductor I...

This paper analyses and simulates a delta delta–sigma modulator, the cascade combination of a delta modulator and a delta–sigma modulator. Using prediction, the delta modulator reduces the dynamic range of a signal prior to quantisation. Using noise shaping, the delta–sigma modulator cancels the error of the delta modulator. Performance is evaluated with input signals from a random noise proces...

We have recently purified the modulator of the glucocorticoid-receptor complex from rat liver. Purified modulator inhibits glucocorticoid-receptor complex activation and stabilizes the steroid-binding ability of the unoccupied glucocorticoid receptor. Since these activities are shared by exogenous sodium molybdate, modulator appears to be the endogenous factor that sodium molybdate mimics. In t...

This paper proposes vector modulator for changing the phase of a signal in passive beamforming system. Vector modulator is used to perform a phase shift function with added benefit of amplitude control. It is used to improve the directivity of RF waves in Wireless systems. Vector modulator is implemented for a center frequency of 902.5 MHz. The simulation is performed for individual blocks of t...

In the present paper, we have deeply investigated the transmission efficiency degradation of electrooptic modulator devices in thermal irradiated hard environments over wide range of the operating parameters. It is well known that the radiation-induced electrooptic modulator defects can modify the initial doping concentrations, creating generation-recombination centres and introducing trapping ...