Language
Country/Area
No result found
The charm of Greinacher circuits: How to reduce ripple in voltage multiplication?
In the field of electronic engineering, booster circuits are a key means to enable many technologies. The design of the boost circuit allows power to be converted in a more efficient manner to support the operation of electronic equipment. Today, we will take an in-depth look at the Greinacher circuit, a construction that not only excels in voltage multiplication, but also demonstrates amazing capabilities in fluctuation management.
What is a boost circuit?
A boost circuit is basically an electronic circuit that increases voltage to twice its original voltage. Depending on the input voltage, these circuits can produce higher DC voltages in an efficient manner. The most basic voltage doubling circuit is a rectifier, which converts alternating current into direct current. Its key components are diodes, which rely on driving to perform switching functions.
Advantages of Greinacher circuit
The Greinacher circuit is a significant improvement on the Villard circuit, mainly composed of additional components, which reduces the filtering fluctuations, especially under open circuit load conditions, the fluctuations are almost zero.
The design of the Greinacher circuit provides a smoother output than the Villard circuit. The circuit was originally invented by Heinrich Greinacher in 1913 to provide the ionization meter he had just invented. Voltage. This circuit can not only effectively reduce voltage fluctuations, but also adjust its output quality according to the different resistance and capacitance values of the load when the load is running.
The evolution from Villard to Greinacher
The simplicity of the Villard circuit attracted many engineers, but the volatility of its output was a fatal flaw. This circuit uses diodes to limit the negative half-wave so that the positive half-wave reaches approximately twice the peak voltage. In contrast, the Greinacher circuit uses a new design and a peak detector part to optimize the overall output voltage, significantly reducing output voltage fluctuations.
Application of voltage doubling technology
Greinacher circuits and their subsequent series of circuits play an important role in many practical applications, including in the high-voltage supply of microwave ovens and in electronic equipment with complex loads. This circuit not only helps boost voltage, but also helps in surge management applications, making it a key component in designing efficient power supplies.
Comparison with other circuits
The Delon circuit uses a bridge topology, which makes it a full-wave voltage multiplier and is widely used in older displays.
Compared with the Greinacher circuit, the Delon circuit operates using two half-wave peak detectors, working in opposite half cycles, resulting in an output that is twice the peak voltage. These circuits greatly improved efficiency and extended the voltage range, particularly in the high voltage needs of cathode ray televisions.
Switched capacitor circuit
There are already many innovative circuit designs, such as the capacitive switching technology used in Dickson charge pumps, which adopts a staggered timing drive method, allowing the output voltage to reach twice its theoretical value. These new technologies play an indispensable role in wireless devices and battery-driven applications, especially when the battery voltage is close to one volt, and can still effectively increase the voltage.
The future of technology
As technology develops, the demand for voltage doubler circuits will also increase. How will the Greinacher circuit and its improved versions evolve in the future? What potential limitations will they break through to cope with growing market demand?
