4 results about "Charge pumping" patented technology

The present invention relates to a method for operating a hydraulic system (100) of a mobile working machine, wherein the hydraulic system (100) is provided with a hydraulic pump (2) which is connected to a hydraulic motor (4) via a first line (10) and a second line (11), wherein a bypass valve (99) is also provided which is positioned between the first line (10) and the second line (11) and is designed to prevent and permit hydraulic connection between the first and the second line (10, 11); wherein the hydraulic system (100) also comprises a charge pump (13) which is designed to supply pressurised fluid to the first and / or the second line (11) in order to compensate for fluid losses occurring during operation of the hydraulic system (100); characterised in that the method comprises the following steps: a) establishing a hydraulic connection between the charge pump (12) and the bypass valve (99) such that the bypass valve (99) can be controlled taking into account a charge pressure provided by the charge pump (12).

This invention discloses a fractional phase-locked loop (PLL) based on multi-path quantization noise compensation. It introduces a data synchronization circuit based on the falling edge of the reference clock, ensuring that the divider signals of all paths have reached steady state before the phase detector is triggered by the next rising edge of the PFD, thus completely eliminating dynamic timing interference in the mixed-signal path. By introducing a multi-path retimer with a sign bit, the compensable quantization noise range is expanded. The current-DAC type charge pump proposed in this invention adopts a charge pump architecture based on a source switch array and a static discharge current. The source switch array utilizes the low impedance characteristics of the source nodes of the current source transistors, significantly improving the switching speed and reducing the settling time. The static discharge current forces the loop to maintain a fixed non-zero phase offset in the locked state, permanently shifting the charge pump operating point out of the nonlinear region and deeply suppressing fractional spurious emissions.

The application relates to an oxygen sensor and a detection method based on an electrochemical detection principle of a charge pump, and belongs to the technical field of sensors.The oxygen sensor comprises a gas detection module and a host module, and the gas detection module and the host module realize real-time data interaction through a data bus; the oxygen sensor comprises a gas detection module and a host module, and the gas detection module and the host module realize real-time data interaction through a data bus; the gas detection module is used for collecting environmental parameters and oxygen parameters, and converts the collected data into digital signals, which are transmitted to the host module through a digital bus; the host module is used for calculating accurate oxygen concentration information under an environmental state in real time according to the obtained environmental parameters and oxygen parameter digital signals. On the basis of reasonable adaptation of hardware and software, multi-dimensional information sensing and preprocessing are realized, and the detection precision of the oxygen sensor and the environmental adaptability of the oxygen sensor can be improved.

This invention provides a configuration that enables more optimal circulation of the hydraulic fluid in the hydraulic system of a crawler-type travel device, such as a crawler-type transport vehicle. [Solution] The hydraulic system Sa is provided for each of the pair of crawlers 16R and 16L and includes closed circuits C1 and C2 through which hydraulic fluid circulates between hydraulic pumps 22 and 24 and hydraulic motors 32R and 32L; a supply oil passage 47 that supplies hydraulic fluid from the hydraulic fluid tank 44 to the closed circuits C1 and C2 by the operation of a charge pump 26; a return oil passage 60 provided with a cooler 63 that returns hydraulic fluid from the closed circuits C1 and C2 to the hydraulic fluid tank 44; and adjustment valve mechanisms 70a and 70b as adjustment means for adjusting the flow rate of hydraulic fluid from the closed circuits to the hydraulic fluid tank via the return oil passage.