A current reference pre-charged zero-crossing pipeline-SAR ADC in 65nm CMOS

2012 ◽  
Author(s):  
Jayanth Kuppambatti ◽  
Peter R. Kinget
Keyword(s):  
Sar Adc ◽  
Zero Crossing ◽  
Current Reference ◽  
A Current

ZERO-CROSS INSTANTANEOUS STATE SETTING FOR CONTROL OF A BIFURCATING H-BRIDGE INVERTER

2007 ◽  
Vol 17 (10) ◽  
pp. 3571-3575 ◽  
Author(s):  
SATOSHI AKATSU ◽  
HIROYUKI TORIKAI ◽  
TOSHIMICHI SAITO
Keyword(s):  
Pulse Width Modulation ◽  
Control Method ◽  
Period Doubling ◽  
Current Mode ◽  
Nonlinear Phenomena ◽  
Unstable Periodic Orbits ◽  
Bifurcation And Chaos ◽  
Zero Crossing ◽  
Modulation Signal ◽  
A Current

This paper studies stabilization of low-period unstable periodic orbits (UPOs) in a simplified model of a current mode H-bridge inverter. The switching of the inverter is controlled by pulse-width modulation signal depending on the sampled inductor current. The inverter can exhibit rich nonlinear phenomena including period doubling bifurcation and chaos. Our control method is realized by instantaneous opening of inductor at a zero-crossing moment of an objective UPO and can stabilize the UPO instantaneously as far as the UPO crosses zero in principle. Typical system operations can be confirmed by numerical experiments.

A 12-bit 50MS/s zero-crossing-based two-stage pipelined SAR ADC in 0.18µm CMOS

2016 ◽  
Vol 57 ◽  
pp. 26-33 ◽  
Author(s):  
Yi Shen ◽  
Shubin Liu ◽  
Zhangming Zhu
Keyword(s):  
Sar Adc ◽  
Two Stage ◽  
Zero Crossing

Current Zero Crossing Detection Circuit for Synchronous Rectification Model Buck Converter

2014 ◽  
Vol 571-572 ◽  
pp. 906-909
Author(s):  
Zhu Lei Shao
Keyword(s):  
Buck Converter ◽  
Drain Voltage ◽  
Zero Crossing ◽  
Power Switch ◽  
Detection Circuit ◽  
Synchronous Rectification ◽  
Different Temperatures ◽  
Current Zero ◽  
Voltage Conversion ◽  
A Current

In order to reduce the power consumption of the synchronous rectification model buck converter, a current zero crossing detection circuit is designed in this paper. The detection circuit determines the freewheeling current of the synchronous rectification power switch is zero or not by detecting the drain voltage of synchronous rectification power switch. Due to use transistors instead of resistors in the voltage conversion, the accuracy of the detection circuit is less affected by temperature and process corner. From the experimental results, the detection circuit can make accurate current zero crossing detection in different temperatures and process corners, and the detection circuit has strong robustness.

PRECISING COMPLEX-COMPENSATED CURRENT REFERENCE BASED ON DIFFERENTIAL MODE OF CURRENTS

2012 ◽  
Vol 21 (07) ◽  
pp. 1250059 ◽  
Author(s):  
L. F. SHI ◽  
Y. ZHAO ◽  
W. G. JIA ◽  
L. Y. CHENG ◽  
X. Q. LAI
Keyword(s):  
Temperature Coefficient ◽  
Temperature Compensation ◽  
Negative Temperature Coefficient ◽  
Supply Voltage ◽  
Negative Temperature ◽  
Differential Mode ◽  
Temperature Coefficients ◽  
Current Reference ◽  
Nonlinear Temperature ◽  
A Current

A current reference with complex compensation using negative temperature coefficient of multiple currents is proposed. The principle of compensation is introduced in detail. This work generates two different compensated currents in the whole temperature range, which is different from the traditional curvature-compensated circuit. The compensation is achieved by using difference of the negative temperature coefficients. Piecewise curvature-compensation and higher order nonlinear temperature compensation are applied at the same time. The proposed circuit is simple and easy to implement. Results of simulation with HSPICE show that the achieved temperature coefficient is only 34.2 ppm/°C compared with 364 ppm/°C under 1 μm BCD process, which is unnecessary to compensate in the range of -25°C ∼ 125°C at 5 V supply voltage.

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