Vidatronic, Inc.

Sameh Ahmed Assem Ibrahim

Mohamed Mostafa Saber Aboudina

Mohamed Ahmed Mohamed El-Nozahi

Faisal Abdellatif Elseddeek Hussien

Moises Emanuel Robinson

Anand Veeravalli Raghupathy

Mostafa Mohamed Hesham Kamel Toubar

Faisal Abdelatif Elsedeek Hussien

A load detection circuit includes a variable current source circuit having a first input connected to a power supply, a second input, and a first output connected to an output load; a switched capacitor circuit having a third input connected to an external voltage reference signal, a fourth input connected to the first output of the variable current source, a fifth input connected to ground, a sixth input, and a second output; a comparator having a seventh input connected to the second output of the switched capacitor circuit, an eighth input connected to the first output of the variable current source, and a third output; an edge detector having a ninth input connected to the third output of the comparator, and a fourth output; and a digital controller having a fifth output connected to the variable current source and a sixth output connected to the switched capacitor circuit.

Circuit and method for load detection using switched capacitors

A band-gap reference circuit includes a band-gap voltage reference core to provide a reference voltage; a low impedance block; three capacitors; two transmission gates to connect and disconnect the capacitors; and two digital control blocks. The three capacitors includes an output capacitor connected at an output of the low impedance block to ground; a small capacitor connected to an output of the band-gap voltage reference core; and a large capacitor connected to the two transmission gates. The band-gap voltage reference core includes an operational amplifier, wherein an output of the operational amplifier connects to an input of the low impedance block and the small capacitor, wherein the small capacitor is also connected to ground; and a combination of bipolar junction transistors, MOS-FET, resistors, capacitors, or FinFET devices that provides a reference voltage.

Method and apparatus for low-output-noise, high-power-supply-rejection and high-precision trimmable band-gap voltage reference suitable for production test

A novel low power enable circuit is less sensitive to power supply variations while consuming less than 50 nA of supply current. The enable circuit includes a voltage clamp circuit which limits the supply level for a first inverter. The clamp circuit having a first input connected to a supply, a second input connected to chip enable, and a first output. The enable circuit further includes a first inverter having a third input connected to the chip enable, a fourth input connected to the first output of the clamp circuit, and a second output; a second inverter having a fifth input connected to the second output of the first inverter, a sixth input connected to the supply, and a third output; a memory element having a seventh input connected to the third output of the second inverter, an eighth input, and a fourth output; and a comparator having a ninth input connected to the chip enable, a tenth input connected to a reference signal, an eleventh input connected to the fourth output of the memory element, and a fifth output connected to the eighth input of the memory element.

Circuit and method for low power chip enable circuitry

An automatically reconfigurable Buck-Boost DC-DC converter having an input supply and an output voltage includes a linear regulator (LDO) for Buck configuration; a switched-capacitor DC-DC converter; a capacitor and switch array, and a gain selector to switch between the linear regulator (LDO) when an output DC level is higher than an input DC level (Buck configuration) and the switched-capacitor DC-DC converter when the output DC level is lower than the input DC level (Boost configuration).

Growing community of inventors

Cairo, Egypt

Sameh Ahmed Assem Ibrahim