i-v conversion module

Abstract

The embodiment of the present invention relates to the field of electronic technology, and discloses an I-V conversion module. In the embodiment of the present invention, the I-V conversion module includes: a current output sensor, a pre-integration circuit, a charge transfer auxiliary circuit, and an I-V conversion circuit including an inverting amplifier; the current output sensor passes through the pre-integration circuit connected to the input end of the I-V conversion circuit; the charge transfer auxiliary circuit is connected in parallel with the inverting amplifier; wherein, when both the pre-integration circuit and the charge transfer auxiliary circuit are open, the pre-integration The integrating circuit pre-integrates the induced current output by the current output sensor to store the pre-integrated charge; when both the pre-integrated circuit and the charge transfer auxiliary circuit are connected, the pre-integrated charge is transferred to the I ‑V conversion circuit. The embodiment of the present invention reduces the time required for the establishment of the I-V conversion module and reduces power consumption.

Description

technical field [0001] Embodiments of the present invention relate to the field of electronic technology, and in particular to an I-V conversion module. Background technique [0002] Existing current-voltage conversion modules, namely I-V conversion modules, such as figure 1 As shown, it consists of a current output sensor 1" and an I-V conversion circuit 2". Wherein, the larger the open-loop gain of the inverting amplifier X is, the larger the bandwidth is, and the faster the response time of the I-V conversion circuit 2″ is. [0003] Such as figure 1 as shown, It is a two-phase non-overlapping clock. Since the I-V conversion circuit 2" is a symmetrical structure, here Take an example to illustrate the working process of the I-V conversion module ( can be deduced in the same way). when , the switch S 1 conduction, the capacitor C 1 Form a negative feedback loop with the inverting amplifier X, the input voltage of the I-V conversion circuit 2" is constant at the...

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Problems solved by technology

[0009] In the process of realizing the present invention, the inventors found the following problems in the prior art: It can be seen from formula 2 that the amplifier low-frequency open-loop gain A 0 And the bandwidth P will affect the response time of the I-V conversion circuit, making the response time of the I-V conversion circuit larger

However, according to the theory, the power consumption of the inverting amplifier X will increase by 4 times for every 2 times the gain-bandwidth product

Obviously, although this method meets the requirements established by the I-V conversion module, the power consumption of the inverting amplifier X is too large

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