Linear Voltage multiplier circuit
#linear amplifier
#analogue amplifier
#voltage amplification
#function generator
#laboratory equipment
#high output load
#square wave
#bandwidth
#fixed gain
Description: The aim of this project was to develop a linear analogue amplifier designed for laboratory use. This amplifier has to realise a voltage amplification of 10x and is intended to amplify function generator signals for tests. Power supply requirements: 230VAC 50 Hz. Fixed gain: 10x. Max. input amplitude: up to ±4V. Bandwidth: DC to 100kHz for square waves signals. High output load drive: 50mA continuous. During the tests, no problems have occurred. The amplifier ran several days with a high voltage output signal (±40V square wave with 20kHz) without any variation of the signal. For the amplification an OPA453 high voltage operational amplifier is used, because a standard operational amplifier cannot be used in the voltage range of ±40V. This rail-to-rail OpAmp can operate with a power supply in the range of ±10V to ±40V. Thus the output amplitude can reach almost ±40V (which is acceptable). That is: 10x (fixed gain) ±4V (input amplitude). Furthermore the OPA453 has a 7.5MHz bandwidth and a high output load drive of 50mA continuous current. To sum up, the OPA453 is the ideal component to fulfil all the constraints for our linear amplifier. A solution using the 230VAC mains supply was selected for this project. It is fed into a 230VAC to 18V/18V transformer (1:(1+1)) with two voltage doublers in order to obtain two 48V voltages. Then two LT3010 adjustable linear regulators are added in order to obtain a smooth ±40V supply voltage for our OPA453 OpAmp.
The linear analogue amplifier designed for laboratory applications utilizes an OPA453 operational amplifier, which is specifically chosen for its capability to handle high voltage ranges, up to ±40V. The amplifier configuration is set to achieve a fixed voltage gain of 10x, allowing it to amplify input signals with a maximum amplitude of ±4V. This results in an output signal that can reach ±40V, making it suitable for a variety of testing scenarios, particularly those involving function generators.
The power supply for the amplifier is derived from a standard 230VAC mains source, which is first transformed down to 18V/18V using a step-down transformer. This transformer is configured with a 1:1+1 winding ratio, effectively providing two separate 18V outputs. To increase the voltage further, two voltage doubler circuits are employed, which convert the 18V outputs into approximately 48V, ensuring that the operational amplifier receives sufficient voltage for its operation.
To regulate the output voltage and ensure stability, two LT3010 adjustable linear voltage regulators are integrated into the design. These regulators are critical for providing a smooth and stable ±40V supply to the OPA453, thus maintaining the performance and reliability of the amplifier during operation. The OPA453 itself boasts a bandwidth of 7.5MHz, making it capable of handling signals with frequency components up to 100kHz, which is essential for the intended application of amplifying square wave signals.
The amplifier's design has been validated through extensive testing, where it successfully operated under high output conditions without any signal degradation or variations. This robust performance underscores the effectiveness of the chosen components and the overall circuit design, making it a reliable tool for laboratory use.The aim of this project was to develop a linear analogue amplifier designed for laboratory use. This amplifier has to realise a voltage amplification of 10x and is intended to amplify function generator signals for tests. Power supply requirements: 230VAC 50 Hz. Fixed gain: 10x. Max. input amplitude: up to ±4V. Bandwidth: DC to 100kHz for square waves signals. High output load drive: 50mA continuous. During the tests, no problems have occurred. The amplifier ran several days with a high voltage output signal (±40V square wave with 20kHz) without any variation of the signal.
For the amplification an OPA453 high voltage operational amplifier is used, because a standard operational amplifier cannot be used in the voltage range of ±40V. This rail-to-rail OpAmp can operate with a power supply in the range of ±10V to ±40V. Thus the output amplitude can reach almost ±40V (which is acceptable). That is: 10x (fixed gain) ±4V (input amplitude). Furthermore the OPA453 has a 7.5MHz bandwidth and a high output load drive of 50mA continuous current.
To sum up, the OPA453 is the ideal component to fulfil all the constraints for our linear amplifier. A solution using the 230VAC mains supply was selected for this project. It is fed into a 230VAC to 18V/18V transformer (1:(1+1)) with two voltage doublers in order to obtain two 48V voltages. Then two LT3010 adjustable linear regulators are added in order to obtain a smooth ±40V supply voltage for our OPA453 OpAmp.
The linear analogue amplifier designed for laboratory applications utilizes an OPA453 operational amplifier, which is specifically chosen for its capability to handle high voltage ranges, up to ±40V. The amplifier configuration is set to achieve a fixed voltage gain of 10x, allowing it to amplify input signals with a maximum amplitude of ±4V. This results in an output signal that can reach ±40V, making it suitable for a variety of testing scenarios, particularly those involving function generators.
The power supply for the amplifier is derived from a standard 230VAC mains source, which is first transformed down to 18V/18V using a step-down transformer. This transformer is configured with a 1:1+1 winding ratio, effectively providing two separate 18V outputs. To increase the voltage further, two voltage doubler circuits are employed, which convert the 18V outputs into approximately 48V, ensuring that the operational amplifier receives sufficient voltage for its operation.
To regulate the output voltage and ensure stability, two LT3010 adjustable linear voltage regulators are integrated into the design. These regulators are critical for providing a smooth and stable ±40V supply to the OPA453, thus maintaining the performance and reliability of the amplifier during operation. The OPA453 itself boasts a bandwidth of 7.5MHz, making it capable of handling signals with frequency components up to 100kHz, which is essential for the intended application of amplifying square wave signals.
The amplifier's design has been validated through extensive testing, where it successfully operated under high output conditions without any signal degradation or variations. This robust performance underscores the effectiveness of the chosen components and the overall circuit design, making it a reliable tool for laboratory use.The aim of this project was to develop a linear analogue amplifier designed for laboratory use. This amplifier has to realise a voltage amplification of 10x and is intended to amplify function generator signals for tests. Power supply requirements: 230VAC 50 Hz. Fixed gain: 10x. Max. input amplitude: up to ±4V. Bandwidth: DC to 100kHz for square waves signals. High output load drive: 50mA continuous. During the tests, no problems have occurred. The amplifier ran several days with a high voltage output signal (±40V square wave with 20kHz) without any variation of the signal.
For the amplification an OPA453 high voltage operational amplifier is used, because a standard operational amplifier cannot be used in the voltage range of ±40V. This rail-to-rail OpAmp can operate with a power supply in the range of ±10V to ±40V. Thus the output amplitude can reach almost ±40V (which is acceptable). That is: 10x (fixed gain) ±4V (input amplitude). Furthermore the OPA453 has a 7.5MHz bandwidth and a high output load drive of 50mA continuous current.
To sum up, the OPA453 is the ideal component to fulfil all the constraints for our linear amplifier. A solution using the 230VAC mains supply was selected for this project. It is fed into a 230VAC to 18V/18V transformer (1:(1+1)) with two voltage doublers in order to obtain two 48V voltages. Then two LT3010 adjustable linear regulators are added in order to obtain a smooth ±40V supply voltage for our OPA453 OpAmp.
LC square wave generator
A square-wave generator utilizing an LC circuit can achieve improved frequency stability, as illustrated in the accompanying chart. This three-terminal capacitor oscillator is capable of generating a square wave, with an operational amplifier serving as the active component.
The square-wave generator...
BENCHTOP FUNCTION GENERATOR WITH BUILT IN COUNTER
This circuit generates sine, square, and triangle waves ranging from 0.1 Hz to 1 MHz. It includes a counter that measures the frequency of the function generator or an external signal with a peak-to-peak voltage of a few volts, which...
a 16w linear amplifier
The Softrock Ensemble RXTX has a 1W output, which is relatively low, so a linear amplifier was constructed to enhance the signal. This amplifier provides 16W output when supplied with a 24V power source (utilizing a 45W switching adapter from...
Triangle and Squarewave Generator by IC 40106
This is a circuit function generator that produces triangle and square wave signals. It utilizes an IC 40106 and a BC547 transistor. The variable resistor VR1 is used to control the frequency output, while switch S3 serves as a selector.
The...
Simple Function Generator
Simple triangle-wave generators have a limitation in that the waveform of their output signal typically cannot be modified. The circuit presented here makes...
The described circuit addresses the inherent limitation of conventional triangle-wave generators by incorporating adjustable components that allow for...
Basic-function-generator
This function generator utilizes a CA3260 BiMOS operational amplifier to perform both integrator and switching functions. A 620-pF capacitor and a 2-kΩ resistor are employed to shape the feedback square wave, minimizing spikes. The device covers the full audio spectrum...
Adjustable function generator
This low-cost operational amplifier circuit (A) generates four different functions with adjustable periods. For the components shown here, the period of the output waveforms is given by T = 4RC and T = 2RC. When switch SI is in position...
Function Generators
A function generator is a signal source capable of producing various types of waveforms as its output signal. The most common output waveforms include sine waves, triangular waves, square waves, and sawtooth waves. The frequencies of these waveforms can be...
20MHz High Speed Function Generator
The High Speed Function Generator was published in the professional electronics section of the Aug 1996 issue of Electronics Australia, and has proven to be extremely popular. The kit is no longer available from any of the kit suppliers.
The High...