Accurate-ramp-generator
The ramp generator serves as a cost-effective alternative to commercial function generators, offering a more linear and repeatable output compared to traditional analog integrators. This circuit produces a triangle waveform in burst mode, generating two cycles of 10.24 ms each for every input trigger pulse. IC4 is configured as a dual monostable multivibrator (one shot), with the A side functioning as a latch. The rising edge of each input pulse triggers the B side, resulting in an output pulse at pin 9, with its duration determined by the timing capacitor's value; a 0.01 µF capacitor yields a 500 µs pulse. This output resets the A side latch. When the latch is reset, QA is high and QA is low, allowing the other three ICs to remain active. The connections P1 through P6 set the frequency of oscillator IC2 to 50 kHz at pin 11. Counter IC3 counts upward, and the output at pin 11 of multifunction converter IC1 ramps up to full scale, reverses, ramps down to zero, and repeats this sequence. Upon completion of its second cycle, IC3 reaches a count of 1024, causing the Q11 output to go high and toggle the IC4 latch. This change of state on QA and QA resets the other three ICs, halting further activity until the next input trigger pulse arrives. IC2 is included for its synchronous-reset capability, which drives the internal clock of IC1, although IC2 can be omitted in certain applications. The circuit operates on a 5-V supply, and modifications to the output can be achieved by adjusting IC2's frequency and IC3's output connection.
The ramp generator circuit comprises several integrated circuits working in harmony to produce a stable triangle waveform. The primary components include a dual monostable multivibrator (IC4), an oscillator (IC2), a counter (IC3), and a multifunction converter (IC1). The circuit's design allows for precise control over the waveform characteristics through the selection of timing components and the configuration of the ICs.
IC4, as a dual monostable multivibrator, plays a crucial role in shaping the output waveform. The A side functions as a latch that maintains its state until reset, while the B side generates a pulse in response to the input trigger. The duration of this pulse is determined by the connected timing capacitor, which can be adjusted to change the pulse width and subsequently affect the triangle waveform's characteristics.
The oscillator (IC2) sets the frequency of the waveform output. By connecting P1 through P6 appropriately, the frequency can be calibrated to 50 kHz, providing a stable timing reference for the counter. The counter (IC3) counts the cycles of the waveform, and upon reaching a specified count (1024), it triggers a reset of the latch, ensuring that the waveform generation can restart seamlessly.
The multifunction converter (IC1) is responsible for generating the ramp signal. Its output at pin 11 is designed to ramp up to a maximum voltage, reverse, and then ramp down to zero, thus creating the desired triangle waveform. The entire circuit operates on a 5-V supply, making it suitable for low-power applications.
Overall, this ramp generator circuit is versatile and can be adapted for various applications by modifying component values, particularly the timing capacitor and the frequency settings of the oscillator. The ability to produce a linear and repeatable waveform makes it an invaluable tool in electronic testing and signal generation tasks.The ramp generator, an inexpensive alternative to commercial function generators, provides a more linear and repeatable output than conventional analog integrators. The circuit provides a triangle waveform in burst mode; in this case, two cycles of 10.24 ms each per input trigger pulse.
IC4 is a dual monostable multivibrator (one shot) in which the A side is configured as a latch (see Multivibrator IC performs extra tasks, EDN, September6, 1984, p. 232). The rising edge of each input pulse triggers the Bside, producing at pin 9 an output pulse whose duration depends on the timing capacitor"s, Cn value-A 0.01-JtF value gives a 500 JtS pulse. This output provides a reset to the A side latch. While the latch is reset with QA high, QA low, the other three ICs are active. The P1 through P6 connections, as shown, set oscillator IC2"s frequency to 50 kHz at pin 11. Counter IC3 counts upward. The output at pin 11 of multifunction converter IC1 ramps up to fullscale, reverses, ramps down to zero, and then repeats this sequence of events.
As this output completes its second cycle, IC3 reaches a count of 1024, causing the Qll output to become high and toggle the IC4 latch. The resulting change of state on QA and QA resets the other three ICs, terminating further activity until the arrival of the next input trigger pulse.
IC2 is included for its synchronous-reset capability, and it therefore drives the internal clock of IC1, which cannot be synchronously reset. Still IC2 can be omitted in some applications. The circuit operates from a 5-V supply. You can modify the output by changing IC2"s frequency and IC3"s output connection. 🔗 External reference
The ramp generator circuit comprises several integrated circuits working in harmony to produce a stable triangle waveform. The primary components include a dual monostable multivibrator (IC4), an oscillator (IC2), a counter (IC3), and a multifunction converter (IC1). The circuit's design allows for precise control over the waveform characteristics through the selection of timing components and the configuration of the ICs.
IC4, as a dual monostable multivibrator, plays a crucial role in shaping the output waveform. The A side functions as a latch that maintains its state until reset, while the B side generates a pulse in response to the input trigger. The duration of this pulse is determined by the connected timing capacitor, which can be adjusted to change the pulse width and subsequently affect the triangle waveform's characteristics.
The oscillator (IC2) sets the frequency of the waveform output. By connecting P1 through P6 appropriately, the frequency can be calibrated to 50 kHz, providing a stable timing reference for the counter. The counter (IC3) counts the cycles of the waveform, and upon reaching a specified count (1024), it triggers a reset of the latch, ensuring that the waveform generation can restart seamlessly.
The multifunction converter (IC1) is responsible for generating the ramp signal. Its output at pin 11 is designed to ramp up to a maximum voltage, reverse, and then ramp down to zero, thus creating the desired triangle waveform. The entire circuit operates on a 5-V supply, making it suitable for low-power applications.
Overall, this ramp generator circuit is versatile and can be adapted for various applications by modifying component values, particularly the timing capacitor and the frequency settings of the oscillator. The ability to produce a linear and repeatable waveform makes it an invaluable tool in electronic testing and signal generation tasks.The ramp generator, an inexpensive alternative to commercial function generators, provides a more linear and repeatable output than conventional analog integrators. The circuit provides a triangle waveform in burst mode; in this case, two cycles of 10.24 ms each per input trigger pulse.
IC4 is a dual monostable multivibrator (one shot) in which the A side is configured as a latch (see Multivibrator IC performs extra tasks, EDN, September6, 1984, p. 232). The rising edge of each input pulse triggers the Bside, producing at pin 9 an output pulse whose duration depends on the timing capacitor"s, Cn value-A 0.01-JtF value gives a 500 JtS pulse. This output provides a reset to the A side latch. While the latch is reset with QA high, QA low, the other three ICs are active. The P1 through P6 connections, as shown, set oscillator IC2"s frequency to 50 kHz at pin 11. Counter IC3 counts upward. The output at pin 11 of multifunction converter IC1 ramps up to fullscale, reverses, ramps down to zero, and then repeats this sequence of events.
As this output completes its second cycle, IC3 reaches a count of 1024, causing the Qll output to become high and toggle the IC4 latch. The resulting change of state on QA and QA resets the other three ICs, terminating further activity until the arrival of the next input trigger pulse.
IC2 is included for its synchronous-reset capability, and it therefore drives the internal clock of IC1, which cannot be synchronously reset. Still IC2 can be omitted in some applications. The circuit operates from a 5-V supply. You can modify the output by changing IC2"s frequency and IC3"s output connection. 🔗 External reference