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Impulse generator utilizing nonlinear transmission line

A non-linear transmission line, pulse generator technology, applied in electrical pulse generator circuits, pulse generation, pulse processing, etc., can solve the problems of narrowing, increasing, and shortening of pulses

Inactive Publication Date: 2010-06-09
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to increase the amount of information that can be transmitted, it is necessary to shorten the time for data (data width) to narrow the pulse

Method used

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  • Impulse generator utilizing nonlinear transmission line
  • Impulse generator utilizing nonlinear transmission line
  • Impulse generator utilizing nonlinear transmission line

Examples

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Embodiment Construction

[0021] Before describing the examples, reference will be made to Figure 3A and Figure 3B to explain the slowing of the rising tail in pulse generators using conventional nonlinear transmission lines. like Figure 3A As shown, assume that a pulse from 0.8V down to 0V and then back up to 0.8V is input. like Figure 3B As shown, the capacitance between the terminals of the diode D forming the nonlinear transmission line depends on the voltage between the terminals across the diode, that is, the capacitance between the terminals increases from V 3 / 2 to V 2 The voltage V between the terminals of the increases. Therefore, when the voltage between the terminals is V ON or higher, the voltage between the terminals increases rapidly. For a signal propagating through a nonlinear transmission line, so when the voltage level is V ON or lower, the diode capacitance is smaller, and when the voltage level is V ON or higher, the diode capacitance rapidly increases. Here, with (LC)...

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Abstract

The impulse generator comprises a nonlinear transmission line capable of obtaining an impulse with a small half value width and a large amplitude, in which a plurality of transmission line units having a unit line unit and a diode are connected in series, a pulse generator connected to the transmission terminal of the nonlinear transmission line, and a bias-dependent element connected to the reception terminal of the nonlinear line, wherein the anode of the diode of the transmission line unit is connected to the transmission line and the cathode is connected to the ground, and one end of the bias-dependent element is connected to the reception terminal of the transmission line and the other end is biased to a negative potential.

Description

[0001] Cross References to Related Applications [0002] This application is based upon and claims priority from prior Japanese Patent Application No. 2007-045925 filed on February 26, 2007, the entire contents of which are hereby incorporated by reference. technical field [0003] The techniques described herein relate to pulse generators that generate extremely narrow pulses, and more particularly to pulse generators that utilize nonlinear transmission lines connected to diodes. Background technique [0004] Pulses output from the pulse generator include frequency components in a wide range from direct current to high frequency, and therefore, the pulse generator is widely used in broadband radio communication systems or measurement systems that generate sampling pulses for oscilloscopes. [0005] figure 1 is a diagram showing an example of a pulse generator in a broadband radio communication system. like figure 1 As shown, the pulses generated by the pulse generator...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K5/04
CPCH04B1/7172H03K5/12H04B1/7174H03K3/00H03K3/017H03K3/53
Inventor 中舍安宏
Owner FUJITSU LTD
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