Electronic Linear Integrated Components

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Transistor Multivibrators

The board is designed to study and experimentally check the most popular configurations of transistor‐ based multivibrating circuits.
The board is divided into three main sections. The first section deals with bistable multivibrators in fixed bias and self‐biased configurations.
The various set, reset and trigger controls are analyzed. The second section affords the study of monostable multivibrators with fixed bias and self bias and the relevant controls. The third section is dedicated to the astable multivibrators.
The board is supplied complete with a set of stackable, plug‐in cables of suitable lengths and colours and with a training manual.
Power supply: ± 15 Vdc, 100 mA
Experiments
• Analysis of the bistable multivibrator with fixed and self bias
• Check of set, reset and trigger controls operation
• Analysis of the monostable multivibrator with fixed and self bias
• Check of the trigger control
•Analysis of the astable multivibrator

DL 2155MVB

Schmitt Trigger and NE555

The board allows to analyze the operation of Schmitt trigger and NE 555 integrated circuit.
It is composed of two sections. The first section allows the study and the experimental checking of the Schmitt trigger. Also two typical applications of this circuit are analyzed: threshold detector and clipper.
The second section is dedicated to the study of the 555 integrated circuit.
This is a flexible and widely used integrated circuit. It is used to generate delays, pulse trains and adjustable duty‐cycle square waves.
The board allows to analyze the block diagram and to experimentally check the most widespread applications. The board is supplied complete with a set of stackable, plug‐in suitable lengths and colours and with a training manual.
Power supply: + 15 Vdc, 50 mA
Experiments
• Analysis and study of Schmitt trigger operation • Use of Schmitt trigger as threshold detector and clipper
• Analysis of the block diagram of NE 555 integrated circuit
• Use of NE 555 as astable and monostable multivibrator

DL 2155TRG

Operational Amplifiers

The board is designed for a first approach to operational amplifiers. It is divided in two sections.
The first section includes a transistor based differential amplifier and allows the general and full study of the input stage of a monolithic operational amplifier.
The concepts of inverting and non‐inverting inputs, common mode and differential amplification and common mode feedback are considered.
The second section shows three different monolithic operational amplifiers and a set of active and passive components, allowing to check and to compare the features of the three amplifiers and the study of the different application fields.
The board is supplied complete with a set of stackable, plug‐in cables of suitable lengths and colours and with a training manual.
Power supply: ± 15 Vdc, 750 mA
Experiments
• Analysis and experimental check of differential mode amplification in a differential amplifier
• Measurement of CMRR and of slew rate
• Analysis and measurement of fixed and adjustable gain inverting amplifiers
• Analysis and measurement of fixed and adjustable gain non‐inverting amplifiers
• Comparison and analysis of application fields of different amplifiers
• Study of application circuits with operational amplifiers

DL 2155AOP

Active Filters

The board allows the study and the functional check on active filters carried out with operational amplifiers.
The board is divided in five sections, and in each one there are more than one filter of the same kind. It is possible to study, respectively:
• low‐pass filter VCVS of the first and second order
• high‐pass filter VCVS of the first and second order
• multiple feedback band‐pass filter
• universal filter of variable‐state type
• dual T band‐stop filters
The board is supplied complete with a set of stackable, plug‐in cables of suitable lengths and colours and with a training manual.
Power supply: ± 15 Vdc, 750 mA
Experiments
• Low‐pass and high‐pass filters of the first and second order with Butterworth, Bessel and Chebyschev approximation
• Multiple feedback band‐pass filters • High‐pass, low‐pass, band‐pass and throw‐band filters of variable state type
• Dual T narrow‐band notch filters

DL 2155FIL

Function Generators

The board allows to perform functional checking of the simplest and most popular square wave generators, pulse generators, triangular wave generators, saw tooth generators and step generators.
All generators are realized with operational amplifiers.
For some generators circuital arrangements have been used to allow adjustment of output signal frequency, duty‐cycle, slope and offset.
It is therefore possible to perform an in depth study of increasing difficulty and complexity level of the function generator circuits.
The board is supplied complete with a set of stackable, plug‐in cables of suitable lengths and colours and with a training manual.
Power supply: ± 15 Vdc, 750 mA
Experiments
• Analysis of square wave and pulse generators with variable duty‐cycle
• Analysis of square wave and triangular wave generators, with frequency, amplitude and offset adjustment
• Analysis of step wave generators
• Analysis of saw‐tooth wave generators

DL 2155GEF

Differentiators, Integrators, Sample and Hold Circuits and Peak Detectors

The board is designed to analyze important circuits for analogue signal processing which are widely used in process controls.
In particular, it is possible to analyze circuits for signal acquisition as sample‐holds or peak detectors and circuits for signal processing like differentiators and integrators.
The board is supplied complete with a set of stackable, plug‐in cables of suitable lengths and colours and with a training manual.
Power supply: ± 15 Vdc, 750 mA
Experiments
• Analysis of the operation of an active differentiator circuit
• Analysis of the operation of an active integrator circuit • Response of integrator and differentiator circuits to dc, square‐wave and sinusoidal signals
• Analysis of the operation of a sample‐hold circuit
• Analysis of the operation of a positive and negative peak detector with open and closed loop

DL 2155DIS

Comparators  

The board is designed to study the operating principle of voltage comparators and to perform experimental checking of the most popular and important circuits realized with these components.
The board is divided into four sections for the study of, respectively:
• hysteresis comparator
• zero crossing detector
• window comparator
• amplitude level classifier
The outputs of the comparators are provided with LED to show their electrical state.
The board is supplied complete with a set of stackable, plug‐in cables of suitable lengths and colours and with a training manual.
Power supply: ± 15 Vdc, 750 mA
Experiments
• Analysis and checking of symmetrical and asymmetrical hysteresis cycle comparators
• Analysis and checking of zero crossing detector and window comparator
• Analysis of amplitude detecting circuits with logic output decoding
• Analysis and checking of inverting and non inverting voltage comparators

DL 2155COM

AC Amplifiers and DC Instrument Amplifiers

The board is arranged in two separate sections allowing the study of DC instrument amplifiers and AC signal and power amplifiers.
The first section includes three amplifiers allowing the realization of different configurations of DC differential amplifiers with high input impedance.
The same section also includes several resistances and a potentiometer for connection to a Wheatstone bridge for functional checking of balanced input amplifiers.
The second section includes active and passive components that allow the realization of different signal amplifier circuits.
Moreover the board includes a power amplifier realized with a complementary symmetry reverse phase transistor.
The board is supplied complete with a set of stackable, plug‐in cables of suitable lengths and colours and with a training manual.
Power supply: ± 15 Vdc, 750 mA
Experiments  
• Analysis and checking of an AC inverting amplifier with single and dual supply
• Analysis and checking of high input impedance differential amplifiers and balanced bridge input amplifiers
• Analysis and checking of AC adding and differential amplifiers
• Analysis and checking of audio and power amplifiers

DL 2155AMP

Analog Switches and Multiplexers

The board is designed to study the problems related to the application of analog switches. These switches, and the multiplexers, find a wide application in data acquisition systems, telephone systems, process controls and in all the situations where low power signals have to be switched with high switching speed.
The board is supplied complete with a set of stackable, plug‐in cables of suitable lengths and colours and with a training manual.
Power supply: ± 15 Vdc and + 5 Vdc, 750 mA
Experiments
• Analysis of analogue switches operations and performances
• Analysis of some typical applications of analogue switches as adjustable gain amplifiers, inverting/non inverting configuration, programmable amplifiers and programmable attenuators
• Analysis of a multiplexer with four analogue inputs
• Analysis of a demultiplexer with four analogue outputs

DL 2155SMA

Voltage Regulators with Integrated Circuits

The board is designed to study the regulators, in particular the voltage regulators, with integrated circuits.
The board is arranged into several modules that allow the study of three terminals positive and negative voltage regulators with either fixed or adjustable output voltage.
Then, a dual voltage regulator and a general‐purpose regulator integrated circuit are analyzed. The board is supplied complete with a set of stackable, plug‐in cables of suitable lengths and colours and with a training manual.
Power supply: ± 15 Vdc, 750 mA
Experiments
• Analysis and functional checking of a three‐terminals positive/negative voltage regulator with fixed output
• Adjustment of output voltage in three‐terminals regulators
• Analysis and functional checking of a dual voltage regulator with separately adjustable voltages
• Measurements of input and output characteristics of previous regulators
• Analysis and operating modalities of a general‐purpose monolithic regulator

DL 2155RTI

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ProductsCodeSheetTender specsManualsVideo
TRANSISTOR MULTIVIBRATORSDL 2155MVB
SCHMITT TRIGGER AND NE555DL 2155TRG
OPERATIONAL AMPLIFIERSDL 2155AOP
ACTIVE FILTERSDL 2155FIL
FUNCTION GENERATORSDL 2155GEF
DIFFERENTIATORS, INTEGRATORS, SAMPLE AND HOLD CIRCUITS AND PEAK DETECTORSDL 2155DIS
COMPARATORSDL 2155COM
AC AMPLIFIERS AND DC INSTRUMENT AMPLIFIERSDL 2155AMP
ANALOG SWITCHES AND MULTIPLEXERSDL 2155SMA
VOLTAGE REGULATORS WITH INTEGRATED CIRCUITSDL 2155RTI