Abstract: This disclosure solves the problem of data security of transactions and turnovers in all distribution levels, including monitoring by the appropriate government institutions, in order to prevent tax avoidance, VAT fraud, smuggling, bootlegging, diversion of original goods from the distribution system and infiltration into the distribution system of counterfeited and original goods without payment of customs, tax and excise duties.

Abstract: The main difference between the boost bridge amplifier according to this invention and state of the art class D amplifiers is in the connection of a load between a power supply and a switching bridge which is supplied from a bridge capacitor. The switching bridge operation is controlled by the pulse-width modulated control signals. Thereby, it is possible to completely eliminate both input and output filters, which are required in state of the art class D amplifiers. It is also possible to achieve several times higher power at the load, due to the additional switching bridge supply from the bridge capacitor. Conducted and radiated EMI noise is significantly reduced in comparison with state of the art class D amplifiers. This embodiment provides a low price, small size and low EMI noise level.

Abstract: The main difference between the power booster amplifier according to this invention and state of the art class D amplifiers is in the connection of a load between a power supply and a switching half bridge which is supplied from a bridge capacitor. The switching half bridge operation is controlled by pulse-width modulated control signals. Thereby, it is possible to completely eliminate both input and output filters which are required in state of the art class D amplifiers. It is also possible to achieve several times higher power at the load due to the additional supply from the bridge capacitor for the switching half bridge. The conducted and radiated EMI noise is significantly reduced in comparison with state of the art class D amplifiers. This embodiment provides a low price, small size and low EMI noise level.

Abstract: This invention discloses a digital frequency measurement system, providing high accuracy and a fast dynamic response over an extremely wide frequency range. This measurement system provides for double buffering of pulse count and pulse period, so that data information change during transfer of this information to the software interrupt routine cannot happen. At each rising and/or falling edge of the measured signal a content of the interval timer is stored into the timer storage device and a content of the pulse counter is changed (incremented or decremented). Each time an interrupt request is generated, a content of the timer storage device is stored into the additional storage device, and a content of the pulse counter is stored into the counter storage device.