Novel low-power-consumption MIPI current mode driver

Abstract

The invention discloses a novel low-power-consumption MIPI current mode driver, and relates to the technical field of pre-emphasis current mode drive. The circuit comprises MOS tubes N1 to N6 and MOStubes P1, P2, N5 and N6, wherein the drain ends of the MOS tubes P1, P2, N5 and N6 are respectively connected with resistors R3 and R4; the resistors R3 and R4 are respectively connected with MOS tubes N7 and N8; when the MOS tube P1 outputs a current, the MOS tube P2 outputs a current, and the current is injected into the MOS tubes N7 and N8. Even if stray capacitance of outp and outn is very large, the appropriate pulse current injection can be adjusted, and the driving capacity of an MIPI output edge is improved, so the high-speed driving capacity of the MIPI is improved while low power consumption is guaranteed. According to the invention, a resistance matching scheme is added on the basis of the traditional MIPI pre-emphasis current mode drive, so the pre-emphasis pulse current can berandomly improved without generating output overshoot, and the MIPI common mode output is not influenced.

Description

technical field [0001] The invention belongs to the technical field of pre-emphasis current mode drive, and in particular relates to a novel low-power consumption MIPI current mode drive. Background technique [0002] The purpose of the MIPI Alliance is to establish interface standards for hardware and software in mobile devices such as smartphones and tablet computers. Through a set of standard hardware interfaces, various peripheral products and products from different suppliers can be connected to many processors or SOCs. Compatible docking. [0003] Existing pre-emphasis current-mode drivers such as figure 2 As shown, N1, N2, N3, and N4 are alternately turned on to complete the MIPI drive output, and N5, N6 are used to pre-emphasize the pulse current output to compensate for the line loss of the MIPI output. The disadvantage is that when the outp and outn output terminals need to mount devices with large parasitic capacitance, for example, 3.3v protection switch tube o...

AI Technical Summary

Problems solved by technology

The disadvantage is that when the outp and outn output terminals need to mount devices with large parasitic capacitance, for example, 3.3v protection switch tube or anti-detonator, etc., at the same time, the pre-emphasis pulse current is generally lower than 20% of the total output current, otherwise it will produce Large output overshoot, changing the output common mode of MIPI, in this case, this traditional circuit cannot support high-speed output

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