Square/Triangular Wave Generator Using Single DO-DVCC and Three Grounded Passive Components

Chien, Heng-Chieh

doi:10.12691/ajeee-1-2-3

Cited by 12 publications

(10 citation statements)

References 16 publications

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“…In this sense, oscillators are typically employed as capacitive sensor interfaces because when a capacitance variation occurs, the circuit can be set in order to show linear and wide output waveform period variations. Furthermore, they can still be employed as resistive sensor interfaces even if, in some cases, the output waveform period is not linearly proportional to the sensing element (typically due to the presence of a logarithmic term) .…”

Section: The Non‐inverting Schmitt Trigger Application: a New Ccii‐bamentioning

confidence: 99%

“…Oscillators are typically based on voltage comparators and positive feedbacks. In the literature, several solutions about CM Schmitt trigger circuits, working as analogue comparators, have been proposed , mainly employing custom solutions that are particularly aimed to use a reduced number of components, to be employed in LV and LP applications and to develop novel techniques towards the threshold setting capability.…”

Section: Introductionmentioning

confidence: 99%

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A CCII‐based non‐inverting Schmitt trigger and its application as astable multivibrator for capacitive sensor interfacing

Marcellis

Ferri

Mantenuto

2016

Circuit Theory & Apps

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This paper presents a novel second-generation current conveyor (CCII)-based non-inverting Schmitt trigger topology. By means of the use of only three resistances, it is possible to set easily the threshold values or, in addition, the trigger can be set also to work as a zero-voltage comparator. The theoretical working principle has been confirmed through PSpice simulations implementing an integrated CCII, designed in a low-cost standard complementary metal-oxide-semiconductor technology (Austria Micro Systems (AMS) 0.35 μm) with low-voltage low-power characteristics, and then by experimental tests on the fabricated printed circuit board prototype through the use of the commercial component AD844 (Analog Devices) as CCII. As its main application example, the presented trigger has been employed to implement an astable multivibrator proposed here as a capacitive sensor interface capable to accurately detect about five decades of capacitive variations in the range of [100 pF-5.5 μF] with a maximum relative error lower than ±10%.

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Section: The Non‐inverting Schmitt Trigger Application: a New Ccii‐bamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A CCII‐based non‐inverting Schmitt trigger and its application as astable multivibrator for capacitive sensor interfacing

Marcellis

Ferri

Mantenuto

2016

Circuit Theory & Apps

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“…A novel square/triangular waveform generator using single DO-DVCC and three grounded passive components was advanced by Chien in [16] and is shown here in Fig. 15.13 The operation of this circuit can be explained as follows.…”

Section: Chien's Do-dvcc-based Square/triangular Wave Generatormentioning

confidence: 99%

Second Generation Miscellaneous Linear/Nonlinear Applications of Various Types of Current Conveyors

2014

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Miscellaneous linear and non-linear applications of varieties of CCs have been elaborated in this chapter. The functional circuits described include instrumentation amplifier, PID controllers, single ended to differential converters, precision rectifiers, astable and monostable multivibrators, square/triangular wave generator and chaos generator, analog multiplier/dividers, squares and square rooters, mutators and memristive and memcapacitive emulators.

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“…Topology of the whole circuitry is simpler than previously proposed concepts; see Refs. [18,20,21,22,23,31,32]. Note that all concepts presented in Refs.…”

Section: Introductionmentioning

confidence: 99%

“…Note that all concepts presented in Refs. [20,21,22,23,24,30,31,32] need an additional f 0→ V sens converter. Thereby, solutions presented in Refs.…”

Section: Introductionmentioning

confidence: 99%

CMOS Current Feedback Operational Amplifier-Based Relaxation Generator for Capacity to Voltage Sensor Interface

Polák

Šotner

Petržela

et al. 2018

Sensors

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This paper presents a simple relaxation generator, suitable for a sensor interface, operating as a transducer of capacitance to frequency/period. The proposed circuit employs a current feedback operational amplifier, fabricated in I3T25 0.35 μm ON Semiconductor CMOS process, and four passive elements including a grounded capacitor (the sensed parameter). It offers a low-impedance voltage output of the generated square wave. Additional frequency to DC voltage converter offers output information in the form of voltage. The experimental capacitance variation from 6.8 nF to 100 nF yields voltage change in the range from 21 mV to 106 mV with error below 5% and sensitivity 0.912 mV/nF evaluated over the full range of change. These values are in good agreement with simulation results obtained from the Mathcad model of frequency to DC voltage transducer passive circuit.

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Square/Triangular Wave Generator Using Single DO-DVCC and Three Grounded Passive Components

Cited by 12 publications

References 16 publications

A CCII‐based non‐inverting Schmitt trigger and its application as astable multivibrator for capacitive sensor interfacing

A CCII‐based non‐inverting Schmitt trigger and its application as astable multivibrator for capacitive sensor interfacing

Second Generation Miscellaneous Linear/Nonlinear Applications of Various Types of Current Conveyors

CMOS Current Feedback Operational Amplifier-Based Relaxation Generator for Capacity to Voltage Sensor Interface

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