39results about How to "Less control signal" patented technology

The present invention provides a control circuit, including a current source module, a conversion module and a first comparison module: the current source module is used to generate a current signal whose magnitude is positively correlated with temperature; the conversion module includes a first conversion unit and / or a second conversion unit , the first conversion unit is used to provide the first voltage signal to the positive input terminal of the first comparison module, and the first voltage signal is positively correlated with the magnitude of the current signal generated by the current source module; the second conversion unit is used to provide the first comparison module The reverse input terminal of the module provides a second voltage signal, and the second voltage signal is negatively correlated with the magnitude of the current signal generated by the current source module; the first comparison module is used to output control when the positive input terminal is greater than the voltage signal of the reverse input terminal signal, the control signal is negatively correlated with the voltage signal difference between the positive input terminal and the negative input terminal of the first comparison module. Correspondingly, the invention also provides a backlight driving device and a display device, and the invention can prevent the temperature of the display device from being too high.

When chip is in stand by mode, system operation timer of the chip is closed so that each module in the chip stops working. Control is started up under slow timer to maintain save mode so as to reach purpose of reducing power consumption and saving electricity. In order to keep synchronization to base station when save mode exits, the invention designs a calculation method to keep good synchronization to base station when save mode exits, and to possess very small frequency deviation. Comparing with prior art, the invention possesses advantages of few control signals, easy of implementation, controllable time in save mode, and small frequency deviation.

The invention provides a two-wire multiplexing circuit, which relates to the technical field of communication circuits. It includes a magnetic coupling isolation circuit, a first communication circuit and a second communication circuit, the output end of the magnetic coupling isolation circuit is connected to the input end of the first communication circuit, and the output end of the first communication circuit is connected to the input end of the second communication circuit. There is no need to send or receive control conversion signal lines, which saves output or input interfaces, saves costs, and improves data transmission efficiency.

The invention discloses a half-rate clock data recovery circuit based on phase selection interpolation. The purpose is to solve the problem that the phase selection interpolation circuit for generating a pair of adjustable quadrature clock signals in the existing structure is too complicated, and proposes a A combination method of a novel phase-selective interpolation circuit. The half-rate clock data recovery circuit based on the phase selection / interpolation type includes a half-rate Bang-Bang type phase detector, a phase selector, a phase interpolator, a digital filter, a digital controller and an outer ring reference clock, and the phase selection Compared with the original structure, the interpolation circuit uses a group of phase selection circuits. While ensuring the generation of a pair of adjustable quadrature clock signals, the scale of the circuit is reduced, thereby reducing the area of ​​the subsequent layout and reducing the power of the overall circuit. consumption.