45 results about "Electron gain" patented technology

The invention provides a generating device of a high-voltage sine wave drive signal. The generating device comprise a computer, a single-chip microcomputer, a field-programmable logic gate array, a digital frequency synthesizer, a transformer, a first low-pass filter, a bias voltage generator, a signal amplifying module, a bias power supply, a high-voltage power supply, a high-voltage amplifying module, a clamping circuit and a second low-pass filter. The amplitude-controllable sine wave signal output by the digital frequency synthesizer is amplified in the mode that the signal amplifying module and the high-voltage amplifying module are in two-stage cascade, and then the high-voltage sine wave signal is obtained through clamping by the bottom clamping circuit. In addition, the noise of the sine wave signal is eliminated through the first low-pass filter after being directly output by the digital frequency synthesizer and through the second low-pass filter after signal clamping. By the adoption of the generating device of the high-voltage sine wave drive signal, the generation method of the sine wave is simplified, the frame frequency of an electron multiplying charge coupled device CCD60 reaches over 1000 Hz, the frequency is increased by one time compared with the frequency of foreign cameras of the same type, and the generating device of the high-voltage sine wave drive signal is used for generating electron gain through high-frequency high-voltage gain drive of the charge coupled device.

The present invention provides a kind of preparation method of the hydroxyl-modified polyaniline that is used as supercapacitor electrode material, dissolves and modifies aniline by glycerin, lactic acid, alginic acid, β-cyclodextrin, thereby makes the polyaniline synthesized Hydroxyl groups are introduced into the long polymer chains to obtain hydroxyl-modified polyaniline. Hydroxyl-modified polyaniline has a significantly higher solubility in water than polyaniline; at the same time, the hydroxyl group can cause the electron gain and loss of the para-amino group on the aromatic ring to undergo a redox reaction. When the hydroxyl-modified polyaniline is used as a supercapacitor material, the capacitance is significant. Increase.

The invention provides a multiplier cluster type photomultiplier tube, which solves the problems of large detection dead zone, measurement errors caused by individual performance differences, and difficulty in accurately adjusting the dynamic range in the current scheme for improving the dynamic range of the photomultiplier tube. The multiplier tube includes a vacuum container, an optical input window, a photocathode, an electron multiplier system, an anode system and a supply electrode. The electron multiplier system is coaxial with the center of the photocathode. The electron multiplier system includes a plurality of spliced ​​electron multipliers, each electron multiplier. An electron multiplying area is formed, and all electron multiplying areas have different electron gains; the area covered by all electron multiplying areas is less than or equal to the effective detection area of ​​the photocathode; the anode system includes multiple anodes, and the number of anodes is the same as the number of electron multiplying poles and the positions are in one-to-one correspondence; power supply The electrode supplies power to the photocathode, the electron multiplier and the anode; the supply electrode is connected to the external power supply system of the vacuum container through the electrode lead; the signal lead wire of each anode is connected to the external circuit through the metal wire.