A Proposed Resistance-to-Time Converter with Switching Impulse Calibrators for Application in Resistive Bridge Sensors

This paper presents a simple resistance-to-time converter. It consists of two voltage comparators, a ramp voltage generator, two logic gates and impulse voltage calibrators. A square-wave generator circuit is suggested in this paper. The design is simple and independent of the OPAMP offset issues. The resulting square-wave is rectified to get its DC equivalent and to a triangular output; the two outputs are applied to a comparator for generating a digital output with a duty cycle proportional to a change in resistance upon which is dependent the DC.

Download Full-text

Fully Electronically Tunable and Easily Cascadable Square/Triangular Wave Generator with Duty Cycle Adjustment

Journal of Circuits System and Computers ◽

10.1142/s0218126619501056 ◽

2019 ◽

Vol 28 (06) ◽

pp. 1950105 ◽

Cited By ~ 7

Author(s):

Bhartendu Chaturvedi ◽

Atul Kumar

Keyword(s):

Duty Cycle ◽

Current Mode ◽

Cmos Technology ◽

Triangular Wave ◽

Square Wave ◽

Generator Circuit ◽

Transconductance Amplifier ◽

Wave Generator ◽

Simulation Results ◽

Triangular Wave Generator

A novel multiple-output dual-X current conveyor transconductance amplifier with buffer-based square/triangular wave generator is introduced in the paper. The proposed generator provides square wave in current mode and triangular wave in voltage mode. Outputs as square and triangular waves are available from terminals with appropriate impedance levels thereby making the proposed generator circuit easily cascadable in both current and voltage modes. The oscillation frequency and amplitude of output square wave are electronically and independently controllable. One more interesting feature of the proposed generator circuit is the adjustable duty cycle. The proposed circuit of square/triangular wave generator is verified through the HSPICE simulation results carried using 0.18[Formula: see text][Formula: see text]m CMOS technology. The simulation results show linear variation of duty cycle against external DC current over a range of 6.5–96%. The variation of square wave’s amplitude via bias current is found to be linear from 10[Formula: see text][Formula: see text]A to 80[Formula: see text][Formula: see text]A. Moreover, the proposed generator can operate very well up to 23.8[Formula: see text]MHz with nonlinearity less than 5%. The proposed generator circuit is also experimentally verified.

Download Full-text

A DCCII based square wave generator with grounded capacitor

2016 International Conference on Circuit, Power and Computing Technologies (ICCPCT) ◽

10.1109/iccpct.2016.7530250 ◽

2016 ◽

Cited By ~ 2

Author(s):

V. Vijay ◽

Avireni Srinivasulu

Keyword(s):

Square Wave ◽

Wave Generator ◽

Square Wave Generator

Download Full-text

Square wave generator

Journal of Scientific Instruments ◽

10.1088/0950-7671/17/6/412 ◽

1940 ◽

Vol 17 (6) ◽

pp. 166-167

Author(s):

A C Cossor Ltd.

Keyword(s):

Square Wave ◽

Wave Generator ◽

Square Wave Generator

Download Full-text

Performance Characterization of Pressure Sensors Using an Improved Pressure Square Wave Generator

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.295-296.533 ◽

2005 ◽

Vol 295-296 ◽

pp. 533-538 ◽

Cited By ~ 1

Author(s):

Tsing Tshih Tsung ◽

Lee Long Han ◽

Liang Chia Chen ◽

Ho Chang

Keyword(s):

Dynamic Characteristics ◽

Dynamic Testing ◽

Dynamic Pressure ◽

Pressure Sensors ◽

Hydraulic Systems ◽

Frequency Wave ◽

Square Wave ◽

Gain Margin ◽

Wave Generator ◽

Square Wave Generator

The purpose of this paper is to analyze and compare the dynamic characteristics of various structure pressure sensors using the Improved Pressure Square Wave Generator (IPSWG). The developed IPSWG is a signal generator that creates pressure square waves as an excitation source. The dynamic characteristics of pressure sensor in hydraulic systems can be measured and evaluated effectively due to the high excitation energy. The method is also useful for dynamic testing and characterization for a high frequency range, which cannot be performed by the traditional methods, such as the hammer kit excitation, sweeping frequency pressure wave, and random frequency wave. Result shows that piezoelectric sensors (quartz) have a largest gain margin and overshoot. The strain gauge sensor has a smaller gain margin and overshoot. The piezoelectric sensor is more suitable for measuring dynamic pressure.

Download Full-text