39 results about "Waveform observation" patented technology

The invention discloses a digital oscilloscope capable of displaying an arithmetical operation result. The digital oscilloscope comprises a channel vertical gear selection knob, a measuring channel, an input unit, an arithmetical operation vertical gear selection knob and a display unit, wherein the channel vertical gear selection knob is used for generating vertical gear information of a measured channel; the measuring channel is used for acquiring a measured waveform according to the vertical gear information; the input unit is used for inputting an arithmetical operation formula; the arithmetical operation vertical gear selection knob is used for generating vertical gear control information of the operated waveform; and the display unit is used for setting a vertical gear of a display window and displaying the measured waveform and the operated waveform corresponding to the operation formula in the display window according to the vertical gear control information of the operated waveform, and setting a maximum vertical gear and a minimum vertical gear of the display window according to the vertical gear information of the measured channel and the arithmetical operation formula. According to the oscilloscope, a gear scope of a high level arithmetic function is determined automatically according to the operation formula; compared with the prior art, a large number of useless gears are removed, and the automatically determined gear scope more facilitates waveform observation of a user.

The invention discloses an FPGA (Field Programmable Gate Array)-based STDP (Spike Timing-dependent Plasticity) synaptic plasticity experimental platform under feedforward neural network. The experimental platform comprises an FPGA development board and an upper computer which are connected with each other, wherein the FPGA is taken as a lower computer and is provided with a human-machine operation interface programmed by C++ to perform synaptic strength connection change waveform and dynamical characteristic observation and parameter setting; the FPGA is used for implementing a mathematic model, and applying an external stimulate signal to a multilayer feedforward neural network and a synaptic connection model; the upper computer is applied to dynamics analysis such as parameter adjustment, synaptic change waveform observation, synaptic adaptive change and the like. The FPGA-based STDP synaptic plasticity experimental platform has the effects that on the basis of a high-speed operation FPGA neural synaptic plasticity computation platform, hardware modeling relative to a synaptic plasticity part among phenotype nerve cells is realized through a non-animal experiment of biological neural synaptic connection, the learning process can be stabilized effectively, and the consistence with real neuronal synapse plastic connection is achieved.