In this paper, a simple and intuitive technique for analyzing clock jitter effect on bandpass Continuous-Time SigmaDelta (Σ∆) modulators is introduced. The power spectral density of the jitter noise for different feedback DAC shapes are derived and compared. It is shown that DAC output signal shapes used to reduce clock jitter sensitivity in lowpass Continuous-Time Σ∆ modulators may not be suit...

In order to design high performance sigma-delta A/D converters, it is essential to estimate the Figure-Of-Merit in the design process. This paper describes the design of a power/performance efficient single-loop multibit sigmadelta modulator for wireless applications. Power dissipation is minimized by optimizing the architecture and by a careful design of analog circuitry. A 3 order 4-bit Σ-∆ m...

In this paper, a new transformerless buck-boost converter based on ZETA converter is introduced. The proposed converter has the ZETA converter advantages such as, buck-boost capability and input to output DC insulation. The suggested converter voltage gain is higher than the classic ZETA converter. In the presented converter, only one main switch is utilized. The proposed converter offers low v...

A non-isolated DC/DC converter with high transfer gain is proposed in this paper. The presented converter consists of the switched inductor and three-level converters. The DC/DC power converter is three-level boost converter to convert the output voltage of the DC source into two voltage sources. The main advantages of DC/DC converter are using low voltage semiconductors and high gain voltage. ...

Improved offline calibration for DAC mismatch in low OSR Sigma Delta ADCs with distributed feedback, " in Proc. Abstract—We present an offline calibration method to correct the non-linearity due to DAC element mismatch in distributed feedback SigmaDelta-modulation A/D-converters. The improvement over previous methods is that not only the first feedback DAC is calibrated, but also the DACs that ...

A novel high-order single-loop incremental sigmadelta ADC for multi-channel applications is proposed. Highorder continuous-time architectures are explored using a 3rd order single-bit modulator as a test-case. The performance of the proposed architecture, taking into account critical nonidealities, is analyzed and its advantages and issues are discussed. Behavioral simulations show a key advant...

Frequency-modulated operation of MEMS gyroscopes promises numerous benefits, including inherently accurate scale factor, improved bias stability, high dynamic range, and low power dissipation. An FM demodulator based on sigmadelta frequency-to-digital conversion decouples dynamic range from power dissipation to achieve a resolution of 41.1μHz in a 50Hz bandwidth for a 30 kHz signal (2.1mdeg/s/ ...

for beneficiation of converter slag, the role of surface phenomena on slag composition was studied. this work includes some experimental data, which were measured for basic oxygen steel (bos) slag in isfahan steel plant. all data were collected on site in the plant. the results support the idea that surface activity plays a major role in converter slag formation. it was also a new finding that ...

This paper presents a 4th order CLCL resonant converter which is suitable for constant current power supply applications. This converter is designed with Immittance characteristic with two inductors and two capacitors in resonant network. A detailed analysis and design process of a 200w converter as a constant current supply have been provided and simulation results are verified with results of...

The class-D power amplifiers which operate in a switched mode have become an attractive alternative of the conventional analog power amplifiers class-A, B and AB in the field of audio applications. They offer high power efficiency compared to analog power amplifiers and can be realised as completely digital power amplifiers. This paper briefly overviews the basic concepts of analog and digital ...