Showing papers on "Charge pump published in 1973"

System oscillations from negative input resistance at power input port of switching-mode regulator, amplifier, DC/DC converter, or DC/DC inverter

Abstract: A switching regulator or a switching-mode amplifier, dc/dc converter, or dc/ac inverter can have a negative dynamic input resistance at the dc power input port. Frequently an LC decoupling filter is inserted in the dc power line between this equipment and the prime dc power source, to keep switching transients off the dc power buss. The negative input resistance of the equipment can exceed the positive output resistance of the LC filter and the power source. Then the system as a whole can oscillate. This oscillation can cause malfunction of the negative-resistance equipnent or of other types of equipment which may also be operated from the prime source. The conditions required for oscillation to take place are defined, and ways are shown to prevent the oscillation. The predicted oscillations have been observed experimentally.

The application of standardized control and interface circuits to three DC to DC power converters

Abstract: Standardized.control and interface circuits were applied to the three most commonly used dc to dc converters: the buck-boost converter, the seriesswitching buck regulator, and the pulse-modulated paral1el inverter. The two-loop ASDTIC regulation control concept was implemented by using a common Analog Control Signal Processor (ACSP) and a novel Digital Control Signal Processor (DCSP). This resulted in control circuit standardization and superior static and dynamic performance of the three dc to dc converters. Power components stress control, through active peak current limiting and recovery of switching losses, was applied to enhance reliability and converter efficiency.

Method and apparatus for limiting charge of a storage battery charged at a constant voltage

Abstract: Method for charging, at a constant voltage, a storage cell battery liable to thermal runaway at the end of charge. The charge current is lowered or shut off at the instant when the derivative of the charge current as a function of the time uses above a predetermined value. This method enables avoidance of all thermal racing phenomena applied to alkaline storage cell batteries, intended more particularly for aircraft. Analog processing and logic processing circuits for signals derived from measurement circuits of the charge current of the battery connected with charge feeding of the battery for control of the charge current are described.

Charge‐coupled memory device

Abstract: Charge‐coupled devices with silicon‐nitride‐silicon‐oxide composite gate dielectric layers have been shown to exhibit electrically alterable static memory. The storage of charge und under a specific gate by combined charge transfer and tunneling into memory states and the detection of its presence at a later time have been demonstrated.

High current, regulated power supply with fault protection

Abstract: A power supply for providing a high current at a regulated voltage level while protecting the power supply from damage due to fault conditions. The power supply provides apparatus for rectifying AC input power and, by means of a DC to DC converter, supplies a DC voltage to the output terminal. The DC output voltage is monitored by feedback circuits. The feedback circuits control the operation of switching elements of the DC to DC converter, and therefore determine the output voltage level, by increasing or decreasing the rate of operation of the switching elements. Various fault conditions, such as over and under-voltage conditions, etc., are monitored by the fault detection apparatus. The detection of a fault condition causes the power supply to suspend operation. Operation of over-current condition detection apparatus is continually verified.

Charge pump photodetector

Abstract: A three-terminal semiconductive photodetector which operates by detecting the carriers accumulated in an inversion layer formed between a semiconductor and a dielectric film when light falls on the device. The amount of charge in the inversion layer is proportional to the light falling on the device and the time during which a pulse of electrical energy is applied between the semiconductor and an electrode on the opposite side of the dielectric layer. The charge is collected by a reverse-biased p-n junction formed in the semiconductor material when the pulse inducing the inversion layer is removed.

Efficient dc/dc converter for a solid state fuze

Abstract: A DC/DC converter for transforming a high voltage to a lower voltage level for use in a solid state electrical time fuze. It comprises a constant charging network to charge a capacitor, which when charged, closes a switch in a series resonant circuit until a second switch closes forming a second resonant circuit.