Sample Analog Electronics Charts

Tutorials and Solutions:

Video Tutorials: Analog Electronics

Solutions: Analog Electronics for ConceptDraw DIAGRAM

Sample 1: Band Gap Reference Circuit

Analog electronics circuit sample: This sample shows the bandgap voltage reference circuit invented by David Hilbiber in 1964. This is a circuit that produces a constant voltage regardless of many factors, including fluctuations in the power supply, temperature changes, circuit load from the device, etc. The bandgap reference is a temperature-independent voltage reference circuit. The bandgap reference includes BJT devices and resistors. The typical output voltage is about 1.25V. The current is generated due to the voltage difference between the two p-n junctions and is proportional to the absolute temperature (PTAT) in the resistor.

This drawing is created using ConceptDraw DIAGRAM diagramming software enhanced with Analog Electronics solution from ConceptDraw Solution Park.

Sample 2: Brokaw Cell Bandgap Voltage Reference

Analog electronics circuit sample: This sample shows a theoretical circuit of the Brokaw bandgap voltage reference, named after its inventor Paul Brokaw. It is used in integrated circuits with an output voltage of 1.25 V and low-temperature dependence. This circuit maintains two internal voltage sources — positive and negative temperature coefficients. By summing these opposite coefficients, the temperature dependence can be canceled. In this case, any of these two internal sources can be used as temperature sensors. Negative feedback is used by the circuit to supply DC current through two bipolar transistors with different emitter areas.

This drawing is created using ConceptDraw DIAGRAM diagramming software enhanced with Analog Electronics solution from ConceptDraw Solution Park.

Sample 3: Current Limiter with NPN Transistors

Analog electronics circuit sample: This sample shows the way of a current limiting circuit by a current limiter with NPN transistors. The actions on current limiting provide protection of the circuit from the harmful effects of a short circuit or overload. Q1 is the output transistor and Q2 is the protection transistor. R1 allows Q1 to turn on, then it passes voltage and current to the load. R2 is an optional component, it protects Q2 in the event of a short-circuited load. R_sense is the load current sensing device. When it exceeds the design limit, Q2 turns on, and Q1 turns off and limits the load current.

This drawing is created using ConceptDraw DIAGRAM diagramming software enhanced with Analog Electronics solution from ConceptDraw Solution Park.

Sample 4: Fluorescent Lamp Inverter

Analog electronics circuit sample: This sample shows a fluorescent lamp inverter circuit. This is a low-pressure mercury gas discharge lamp. Fluorescent lamps convert electrical energy into usable light and are more efficient than incandescent lamps. The typical circuit includes transistors used to convert power frequency AC power to high-frequency AC power, a simple oscillator, and an LC series resonant circuit.

This drawing is created using ConceptDraw DIAGRAM diagramming software enhanced with Analog Electronics solution from ConceptDraw Solution Park.

Sample 5: Nullor Circuit

Analog electronics circuit sample: This example shows a voltage-controlled current sink. Nullor provides any required current and does not depend on the voltage at its output. The output current depends on the user applied input voltage Vin and the reference resistor RR. The transistor included in the circuit provides a decrease in current in the PP, fed by the op-amp.

This drawing is created using ConceptDraw DIAGRAM diagramming software enhanced with Analog Electronics solution from ConceptDraw Solution Park.

Sample 6: Simple MOSFET Mirror

Analog electronics circuit sample: This sample shows the current mirror of a MOSFET. The current mirror is used in microcircuits. The current mirror MOSFET includes MOSFETs (M1 and M2) that operate in saturation or active mode and are used to set the reference current Iref. Vdd is the supply voltage, the output current Iout is directly related to Iref. The reference current Iref is provided by a resistor, a current source with a set threshold, or a current source with auto-bias. This ensures constancy and independence from changes in supply voltage.

This drawing is created using ConceptDraw DIAGRAM diagramming software enhanced with Analog Electronics solution from ConceptDraw Solution Park.

Sample 7: Trans-impedance Amplifier with a Reverse Biased Photodiode

Analog electronics circuit sample: This sample shows a trans-impedance amplifier (TIA) with a reverse-based photodiode. TIA is a current to voltage converter. It includes one or more operational amplifiers. The subject TIA includes a high resistance feedback resistor Rf. It sets the gain of the amplifier and is equal to -Rf due to the inverting configuration of the amplifier.

This drawing is created using ConceptDraw DIAGRAM diagramming software enhanced with Analog Electronics solution from ConceptDraw Solution Park.

Sample 8: Two Transistor Feedback Amplifier

Analog electronics circuit sample: This sample shows a two-transistor amplifier with a feedback resistor Rf. Its circuit includes many resistors. Resistor R2 is in series with the output and measures the output current. Resistor Rf is connected in parallel with the input and subtracts the input current from it. The source impedance Rs is combined with the base resistor Rb. The amplifier uses current feedback. The output node is also shown in the diagram.

This drawing is created using ConceptDraw DIAGRAM diagramming software enhanced with Analog Electronics solution from ConceptDraw Solution Park.

Sample 9: Unipolar Stepper Motor Driver

Analog electronics circuit sample: This sample shows a unipolar stepper motor driver circuit. Unipolar motors consist of a complex coil system. Each coil of a unipolar motor has three connections and includes a center tap. The windings in unipolar motors are bifilar, two coils are wound on top of each other, and they connect the connectors "a" and "b" with the central tap. Voltage is applied to terminals 1a, 1b, 2a, and 2b.

This drawing is created using ConceptDraw DIAGRAM diagramming software enhanced with Analog Electronics solution from ConceptDraw Solution Park.

Sample 10: Virtual Ground Active Mixer

Analog electronics circuit sample: This sample shows a virtual ground active additive mixer. It is an electronic device that combines two or more electronic or electrical signals into one or two output signals. Additive mixers are analog adders and add the values of two or more signals at some point. As a result, they provide a composite signal containing the frequency components of each of the original signals. Made in the form of monolithic or hybrid integrated circuits, they are suitable for a wide range of frequency ranges.

This drawing is created using ConceptDraw DIAGRAM diagramming software enhanced with Analog Electronics solution from ConceptDraw Solution Park.

All samples are copyrighted CS Odessa's.

Usage of them is covered by Creative Commons “Attribution Non-Commercial No Derivatives” License.

The text you can find at: https://creativecommons.org/licenses/by-nc-nd/3.0