A current-mode 1kHz/10kHz low-voltage integrated analogue PLL for lock-in portable applications

2003 ◽  
Vol 31 (2) ◽  
pp. 139-155 ◽  
Author(s):  
Giuseppe Ferri ◽  
Ernesto Massa
Keyword(s):  
Low Voltage ◽  
Current Mode ◽  
Lock In ◽  
A Current

A current-mode bit-block circuit applicable to low-voltage, low-power pipeline video-speed A/D converters

1996 ◽  
Vol 11 (2) ◽  
Author(s):  
Yasuhiro Sugimoto ◽  
Shunsaku Tokito ◽  
Hisao Kakitani ◽  
Eitaro Seta
Keyword(s):  
Low Power ◽  
Low Voltage ◽  
Current Mode ◽  
A Current

New Generations of Highly Integrated High Temperature DC-DC Converters

2014 ◽  
Vol 2014 (HITEC) ◽  
pp. 000014-000017
Author(s):  
Pierre Delatte ◽  
Thomas François ◽  
David Baldwin ◽  
Jan Beranek ◽  
Zlatan Gradincic ◽  
...  
Keyword(s):  
Low Voltage ◽  
Current Mode ◽  
Fast Response ◽  
Internal Clock ◽  
Switching Frequency ◽  
Maximum Output ◽  
Single Chip ◽  
High Switching Frequency ◽  
External Clock ◽  
A Current

This paper presents YELLOWSTONE, a single chip, low-voltage, synchronous Buck DC-DC converter implementing a current mode PWM controller with built-in N & P-channel power MOSFETs. It aims to be used as a Point-of-Load (PoL) switched mode power supply with a maximum output current of 500mA. It generates from a typical +3.3V or +5V voltage input a lower voltage output between +0.9V and +3.3V configurable by an external resistor network. It has been specified and designed for operation at temperatures from −55°C to +225°C. Synchronous rectification increases efficiency and reduces external components count. The circuit achieves power efficiencies in excess of 90%. The chip implements a current mode PWM control which enables a fast response to line and load transient variations. A high switching frequency (1.5MHz typical with internal clock and up to 2MHz with external clock) has been selected enabling a dramatic reduction of the number and size of passive external components. The current mode control made possible to use a simple compensation loop and to integrate it. High integration level, tiny IC package (5mm*5.5mm) and small external passive components, lead to a very small footprint for the complete PoL function, i.e. as small as 0.25inch2 (10mm*15mm).

scholarly journals Current-mode CMOS Active Inductor with Applications to Low-Voltage Oscillators

2013 ◽  
Vol 3 (6) ◽  
pp. 540-543
Author(s):  
M. Ma ◽  
Z. Li ◽  
Z. Yao
Keyword(s):  
Negative Feedback ◽  
Power Supply ◽  
Low Voltage ◽  
Current Mode ◽  
Active Inductor ◽  
Transistor Structure ◽  
Current Mirrors ◽  
Active Inductors ◽  
A Current

This paper investigates a current mode active inductor. In the proposed active inductor, three current mirrors have been connected to each other to realize the negative feedback. This active conductor has a two layer transistor structure. A 4.257 GHz, 1.2-V power supply non-inductive LC negative resistor oscillator, base on two of the proposed active inductors, is demonstrated.

Realizing Dynamic Thermal Laser Stimulation by Lock-in IR-OBIRCH Assisted with a Current Detection Probe Head

2013 ◽  
Author(s):  
Chunlei Wu ◽  
Suying Yao
Keyword(s):  
Operating Condition ◽  
Laser Stimulation ◽  
Detection Probe ◽  
Novel Method ◽  
Lock In ◽  
Current Detection ◽  
Parametric Failure ◽  
A Current ◽  
Probe Head

Abstract Lock-in IR-OBIRCH analysis, as a kind of static thermal laser stimulation (S-TLS) technique, is very effective to isolate a fault for the parametric failure cases. However, its capability is limited to localize a defect when the IC is operated under a defined operating condition. Whereas the dynamic thermal laser stimulation (D-TLS) technique is good at locating a fault while the IC is operated under some functions to activate the failure. In this paper, a novel method is presented to realize DTLS just by Lock-in IR-OBIRCH assisted with a Current Detection Probe Head. Two cases are studied to demonstrate the effectiveness of this method.

Synthesis for Butterworth Filter Using Compact VDTA Based on Sallen- Key Topology

2020 ◽  
Vol 13 (5) ◽  
pp. 681-688
Author(s):  
Yong-An Li
Keyword(s):  
Network Theory ◽  
Current Mode ◽  
Second Order ◽  
Frequency Filter ◽  
Butterworth Filter ◽  
Admittance Matrix ◽  
Floating Capacitor ◽  
A Current

Background: The original filter including grounded or virtual ground capacitors can be synthesized by using the NAM expansion. However, so far the filters including floating capacitor, such as Sallen-Key filter, have not been synthesized by means of the NAM expansion. This is a problem to be researched further. Methods: By using the adjoint network theory, the Sallen-Key filter including floating capacitor first is turned into a current-mode one, which includes a grounded capacitor and a virtual ground capacitor. Then the node admittance matrix, after derived, is extended by using NAM expansion. Results: At last, one VDTA Sallen-Key filter is received. It employs single compact VDTA and two grounded capacitors. Conclusion: A Butterworth VDTA second-order frequency filter based on Sallen-Key topology with fo = 100kHz, HLP = -HBP=1, is designed.

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