39results about How to "Meet the input requirements" patented technology

The embodiment of the invention discloses a receiving chip circuit and a communication system; wherein, the receiving chip circuit comprises M receiving chips; in the M receiving chips, the input ends of N receiving chips are respectively provided with a regulating circuit which is used for gaining energy of clock signals input into the input end of the N receiving chips in a selected frequency band to a preset value; wherein, N is an integer which is more than zero and M is larger than N. The communication system comprises a PCB, which is provided with a clock chip and the receiving chip circuit; and the clock chip provides clock signals for the M receiving chips in the receiving chip circuit by transmission lines. The embodiment of the invention can effectively improve rising rate of the clock signals, reduce the rising time of the clock signals, meet the input requirements of working chips and guarantee the stable working of the working chips.

The invention provides a rotating shaft angle and speed measuring device to improve the measuring precision of an existing rotating shaft angle and speed measuring device. The structure of the devicecomprises a permanent magnet, a chip integrated with a magnetoresistive sensor, and a PCB circuit board. A number of chips are arranged on the upper end face of the PCB circuit board. A number of counter bores are arranged in the lower end face of the PCB circuit board. The axis of each counter bore passes through the centroid of a chip. The permanent magnet and the PCB circuit board are firmly connected through the counter bores. The magnetoresistive sensor is provided with a first power supply connection end, a grounding end, a first signal output end and a second signal output end. The first signal output end is connected in series with a first resistor and is electrically connected with a second power supply connection end. The first signal output end is connected in series with a second resistor and is grounded. The second signal output end is connected in series with a third resistor and is electrically connected with the second power supply connection end. The second signal output end is connected in series with a fourth resistor and is grounded. According to the invention, the connection relationship between the permanent magnet and the PCB circuit board is improved, and the detection sensitivity is greatly improved.

The invention relates to the technical field of analog integrated circuits, in particular to the design of a switching power supply soft-start circuit for a bipolar error amplifier. The invention includes a reference voltage switching circuit and an error amplifier bias circuit, and uses the principle of clamp feedback to realize smooth switching from the beginning to the end of the soft start process. The beneficial effect of the present invention is that it has universal applicability, can meet the input requirements of bipolar error amplifier and MOS error amplifier at the same time, and the circuit will not appear glitch voltage in the power-on process, and can realize smooth transition, thereby improving System stability and reliability. The invention is especially suitable for soft start circuits of switching power supplies.

Provided is a method for acquiring continuous physical signal such as temperature, pressure and the like. The method comprises the following steps: inputting a voltage signal u representing continuous physical signal; obtaining a sampled signal u k of an analog voltage through an analog sampling channel (1), wherein the sampling frequency is f”h; performing digital low-pass filtering on the u k (6) to obtain a voltage signal u k subjected to low-pass filtering, and resampling the u k to obtain a resample signal u j , wherein the resampling frequency f”y is the same as the sampling frequency required by an application terminal and the sampling frequency f”h is M times of the resampling frequency f”y; and storing and outputting the resample signal u j to the application terminal. Provided also is a corresponding device. The cost of the analog sampling channel is lowered; the u j can be directly applied to industrial automation for substitution of the u j , especially output signals do not contain transient values, the requirements of a stable model on input quantity can be met, the random disturbance can be inhibited, and the measurement accuracy can be improved.

The invention discloses a BiGRU network drilling condition identification method combined with an attention mechanism. The method uses a large amount of actual data generated during drilling as a basis, and carries out a series of data enhancement methods to expand the number of samples to the greatest extent. less problems. And in order to reduce the black box effect during machine learning, a decision tree recognition model guided by semi-empirical formulas combined with actual data is designed to assist manual data annotation. For the time series drilling information, a bidirectional gate control unit network capable of extracting sequence features is used to train the model, and the parameters are strictly adjusted. Finally, the data of a single well that did not participate in the training was used to test the generalization ability of the model without transfer learning and pre-training; comparison experiments proved that this method can ensure a high accuracy in the time series prediction of drilling conditions The feasibility and versatility under the conditions have practical application value.