Dc Output Chopper Circuit
#dc voltage
#chopper circuit
#unipolar square wave
#PUT relaxation oscillator
#trigger pulses
#CMOS
#low frequencies
#voltage range
Description: A direct current (DC) voltage source within the range of 2 to 15 volts can be converted into a unipolar square wave. This square wave has a peak amplitude that is nearly equal to the DC source voltage, with lightly loaded complementary metal-oxide-semiconductor (CMOS) circuits swinging within a few millivolts of each rail at low frequencies. The programmable unijunction transistor (PUT) relaxation oscillator generates trigger pulses at a frequency of 2000 Hz, depending on the actual voltage of the supply. These pulses are utilized to operate a cascaded 74C107 flip-flop, which produces the square wave output.
The described circuit utilizes a DC voltage source, which serves as the input for the conversion process. The unipolar square wave generated from the DC voltage is characterized by its peak amplitude closely matching the input voltage, making it suitable for various applications requiring a square wave signal. The lightly loaded CMOS configuration ensures that the output remains stable and exhibits minimal voltage drop, thus maintaining signal integrity.
The relaxation oscillator, implemented with a programmable unijunction transistor (PUT), functions as the core timing element of the circuit. The frequency of the generated trigger pulses is set at 2000 Hz, which can be adjusted based on the supply voltage. This frequency is critical for applications that require precise timing and synchronization.
The cascaded 74C107 flip-flop plays a pivotal role in shaping the output waveform. This dual D-type flip-flop configuration allows for the generation of a square wave signal, effectively transforming the trigger pulses from the PUT into a coherent output. The output from the flip-flop can be utilized in various digital applications, including signal processing, clock generation, and timing circuits.
Overall, this circuit demonstrates an efficient method of converting a DC voltage source into a square wave signal, leveraging the capabilities of a PUT and a 74C107 flip-flop to achieve reliable and precise output characteristics. Any dc voltage source in the 2- to 15-V range can be chopped into a unipolar square wave that has a peak amplitude nearly equal to the dc source voltage-with circuit (lightly loaded CMOS will swing within a few millivolts of each rail at low frequencies). Depending on the actual voltage of the supply, the programmable-unijunction-transistor (PUT) relaxation oscillator produces 2000-Hz trigger pulses.
These pulses operate the cascaded 74C107 flip-flop, producing a square wave.
The described circuit utilizes a DC voltage source, which serves as the input for the conversion process. The unipolar square wave generated from the DC voltage is characterized by its peak amplitude closely matching the input voltage, making it suitable for various applications requiring a square wave signal. The lightly loaded CMOS configuration ensures that the output remains stable and exhibits minimal voltage drop, thus maintaining signal integrity.
The relaxation oscillator, implemented with a programmable unijunction transistor (PUT), functions as the core timing element of the circuit. The frequency of the generated trigger pulses is set at 2000 Hz, which can be adjusted based on the supply voltage. This frequency is critical for applications that require precise timing and synchronization.
The cascaded 74C107 flip-flop plays a pivotal role in shaping the output waveform. This dual D-type flip-flop configuration allows for the generation of a square wave signal, effectively transforming the trigger pulses from the PUT into a coherent output. The output from the flip-flop can be utilized in various digital applications, including signal processing, clock generation, and timing circuits.
Overall, this circuit demonstrates an efficient method of converting a DC voltage source into a square wave signal, leveraging the capabilities of a PUT and a 74C107 flip-flop to achieve reliable and precise output characteristics. Any dc voltage source in the 2- to 15-V range can be chopped into a unipolar square wave that has a peak amplitude nearly equal to the dc source voltage-with circuit (lightly loaded CMOS will swing within a few millivolts of each rail at low frequencies). Depending on the actual voltage of the supply, the programmable-unijunction-transistor (PUT) relaxation oscillator produces 2000-Hz trigger pulses.
These pulses operate the cascaded 74C107 flip-flop, producing a square wave.
Magic Wand Conjuring Trick
The operation of the circuit is fairly simple. Three AND logic gates of a 4081 CMOS IC are employed, with gates IC1a to IC1c being configured as a standard cascaded latch circuit. S1 to S3 serve as reset switches. The...
TV LINE DECODER I
This circuit generates outputs on TV lines 24 and 257. It was utilized for a decoder circuit and employs a CMOS counter along with gate logic. Only one pin is designated for the output line indicator.
The circuit described serves a...
Removing pop from a CMOS switch
A simple audio switching circuit is experiencing issues. The circuit utilizes a CD40106 Schmitt Trigger in conjunction with a CD4066 CMOS switch to route audio signals.
The circuit design incorporates a CD40106 Schmitt Trigger, which is essential for providing clean signal...
4093 Cmos Astable Oscillator Circuit
Two gates of the Quad 4093 are utilized to create an oscillator. The resistor (R) can range from approximately 5 kΩ to around 10 kΩ. The capacitor (Cx) can vary from about 10 pF to higher values, with the upper...
CMOS Toggle Flip Flop Switch
The circuit below uses a CMOS dual D flip flop (CD4013) to toggle a relay or other load with a momentary push button. Several push buttons can be wired in parallel to control the relay from multiple locations. A high...
Cmos-oscillator
This circuit is guaranteed to oscillate at a frequency of approximately 2.2/(R1 x C) if R2 is greater than R1. Additionally, the number of gates can be reduced further by replacing gates 1 and 2 with a non-inverting gate.
The described...
A Dozen Small Cmos Alarm Circuits
A selection of small self-contained CMOS alarm circuits is presented. The main features of each alarm are indicated on the circuit diagram itself. All circuits exhibit a very low standby current, making them suitable for battery operation. Each pair of...
Cmos-universal-logic-probe
The circuit requires only the CD4009AE hex buffer, two resistors, and two LEDs to create a logic probe. This CMOS logic probe has an input impedance of 10^12 ohms and operates within a voltage range of 3 to 15 volts....
Pulse DemodulatorCircuit
The Pulse Demodulator, as illustrated in the accompanying image, consists of a CMOS Hex Inverter. This circuit is capable of performing envelope detection on amplitude pulses.
The Pulse Demodulator utilizing a CMOS Hex Inverter is designed to extract the envelope of...