Abstract: An electromagnetic interference suppression circuit and a related sensing circuit. The sensing circuit includes an input and an output operatively coupled with the input. The input is adapted to be connected on a power line and in series between a load and a shunt circuit connected across power lines between a power source and the load. The output is adapted to provide a signal (Vs) associated with an electromagnetic interference signal (Vn) generated by or at the load and arranged to be experienced by the shunt circuit. The signal (Vs) can be used for determining a suppression signal (Vn?) for reducing, or substantially eliminating, the electromagnetic interference signal (Vn). The electromagnetic interference suppression circuit includes the sensing circuit, a regulator circuit, and a controlled signal source.

Abstract: A circuit for suppressing electromagnetic interference signal on power lines. The circuit includes a first sensing circuit, a first amplifier, and a first controlled signal source. The first sensing circuit is arranged to sense a first electromagnetic interference signal. The first amplifier is arranged to be powered by a power source. The first amplifier provides a first amplification factor and being operably connected with the first sensing circuit to amplify a signal sensed by the first sensing circuit. The first controlled signal source provides a second amplification factor and is operably connected with the first amplifier to regulate or further amplify the amplified signal to provide a first suppression signal that reduces the first electromagnetic interference signal. Multiple such circuits can be cascaded to form a mufti-stage electromagnetic interference suppression circuit.

Abstract: A method for securing transaction in a blockchain network and a related system with a blockchain network. The blockchain network has information handling devices operably connected with each other. The information handling devices collectively maintain a blockchain ledger containing one or more transaction blocks with transaction information. The method includes validating a new transaction request to be added to the blockchain ledger. The validation includes digitally signing, at two or more of the information handling devices in the blockchain network, respectively, an interim block associated with the new transaction request, using a HASH value of the interim block and respective private keys of the two or more of the information handling devices. The method also includes verifying the one or more signed interim blocks for determining whether to add to the blockchain ledger a new transaction block containing the validated new transaction request and the at least two digital signatures.

Abstract: An auxiliary converter circuit for regulating an input current to a main switching converter circuit. The auxiliary converter circuit has a voltage detector for determining a change in a voltage across the auxiliary converter circuit, and a current sensor for sensing an input current to the main switching converter circuit. The auxiliary converter circuit also has a current compensation circuit that includes a comparator circuit arranged to compare the sensed input current with a reference current; and a controlled current circuit. The controlled current circuit is arranged to selectively provide a positive compensation current and a negative compensation current to the input current, based on the determined voltage change and the comparison, for suppressing harmonic distortion and electromagnetic interference in the input current.

Abstract: A control circuit for suppressing electromagnetic interference signal has an input and an output and a variable gain filter circuit with a first gain factor that is variable. The variable gain filter circuit receives a signal indicative of an electromagnetic interference signal and outputs a signal to a controlled signal source, which a second gain factor. The control circuit also has a controller operably connected to the variable gain filter circuit. The controller receives a signal indicative of an output signal at the output of the control circuit and outputs a control signal to the variable gain filter circuit. The control signal is based on the signal indicative of the output signal at the output of the control circuit, and the control signal controls the first gain factor and reduces the electromagnetic interference signal.