Circuit structure of narrow-pulse-width high-repetition-frequency pulse current source

Abstract

The invention discloses a circuit structure of a narrow-pulse-width high-repetition-frequency pulse current source. The circuit structure is characterized by comprising an adjustable reference voltage input module (1), a current source module (2), an adjustable narrow pulse generating and shaping module (3), a high-speed selection module (4) and a current mirror module (5), wherein the adjustable reference voltage input module (1), the current source module (2) and the current mirror module (5) are electrically connected in sequence; and the adjustable pulse generating and shaping module (3), the high-speed selection module (4) and the current mirror module (5) are electrically connected in sequence. By adopting the circuit structure, the pulse width, the current magnitude and the pulse frequency can be adjusted. Moreover, the circuit structure has the advantages of narrow pulse width, high repetition frequency, high current, small overshoot and steep leading edge.

Description

technical field [0001] The present invention relates to the technical field of semiconductor laser drive source, more specifically, relates to a pulse current source circuit structure with narrow pulse width, high repetition frequency, high current and low overshoot. Background technique [0002] With the development of semiconductor laser manufacturing technology and design level, semiconductor lasers with high repetition frequency, fast front, narrow pulse width and high peak power have been widely used in industry, military, scientific research and other fields, especially in laser ranging, laser Radar, laser communication and other fields. To obtain a high-energy, narrow-pulse-width optical pulse for a high-power semiconductor laser, a pulsed current source that can provide good driving is required, which not only requires the output current pulse to have a high repetition rate, fast rising edge, and narrow pulse Width, a certain amplitude, and the waveform of the outpu...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a pulse current source circuit with insufficient narrow pulse width, insufficient repetition frequency, insufficient pulse height, insufficient leading edge, and excessive overshoot in the prior art. The current source circuit structure can adjust the pulse width, current size and pulse frequency, and has the characteristics of narrow pulse width, high repetition frequency, large current, small overshoot, and steep leading edge

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