Granted Patent B2

US 12,487,344 · App. 17/613,686 · Granted Dec 2, 2025

Inventor: Shuyu Lei (Ningbo, CN)

Assignee: Ningbo ABAX Sensing Electronic Technology Co., Ltd.

G01S7/497G01S7/4861G01S7/4913

Abstract

Claims (23)

1 . A device for processing decoherence effect, the device comprising:

a signal acquisition module; and

a processing module, wherein

an output end of the signal acquisition module is connected to an input end of the processing module;

the signal acquisition module is configured to acquire a coherent light and convert the coherent light into a first signal having a polarity; and

the processing module is configured to depolarize the first signal to obtain a correlation value of the first signal;

wherein the processing module comprises one of the following: a unidirectional conducting unit, a class B power amplifier, and a multiplier,

a conversion module provided between the signal acquisition module and the processing module, wherein the conversion module is configured to convert the first signal into a second signal;

wherein the processing module comprises a Gilbert unit having four input terminals and two output terminals, wherein the four input terminals comprise a first input terminal, a second input terminal, a third input terminal and a fourth input terminal, and the two output terminals comprise a first output terminal and a second output terminal;

both the first input terminal and the third input terminal of the Gilbert unit are connected with an output end of the conversion module to acquire the second signal;

both the second input terminal and the fourth input terminal of the Gilbert unit are connected to a reference signal input module to acquire a reference signal;

the Gilbert unit is configured to: compare the second signal with the reference signal to obtain a relative difference, and determine a result of squaring the relative difference as the correlation value; and

a difference between a signal outputted from the first output terminal of the Gilbert unit and a signal outputted from the second output terminal of the Gilbert unit is the correlation value.

2 . The device according to claim 1 , wherein the conversion module comprises: an amplifying circuit, and wherein

one terminal of the amplifying circuit is connected to a signal input end, and the other terminal of the amplifying circuit is connected to the output end of the signal acquisition module, and the amplifying circuit is configured to convert the first signal outputted by the signal acquisition module through a signal inputted from the signal input end, to obtain the amplified second signal.

3 . The device according to claim 2 , wherein the amplifying circuit comprises a common-gate amplifier.

4 . The device according to claim 3 , wherein the common-gate amplifier comprises: a resistance unit and a first mos transistor, and wherein

one end of the resistance unit is connected to the signal input end, the other end of the resistance unit is connected to a drain of the first mos transistor, and a source of the first mos transistor is connected to the output end of the signal acquisition module.

5 . The device according to claim 4 , wherein the resistance unit comprises: a second mos transistor, a second isolation element and a second capacitor, and wherein

the signal input end is connected to one end of the second capacitor and a source of the second mos transistor, the other end of the second capacitor is connected to a gate of the second mos transistor and one end of the second isolation element, and the other end of the second isolation element is connected to a drain of the second mos transistor and the drain of the first mos transistor.

6 . The device according to claim 1 , wherein the reference signal input module comprises: a first isolation element and a first capacitor, and wherein

one end of the first capacitor is connected between the first isolation element and the processing module, the other end of the first capacitor is grounded, and the first capacitor is configured to: store charges corresponding to a third signal in a case that the first isolation element is conducting, wherein the third signal includes a signal into which the signal acquisition module converts a background light; and

the first isolation element is provided between the signal acquisition module and the processing module and is configured to control conducting or non-conducting between the signal acquisition module and the processing module, wherein in the case of conducting, the charges outputted by the signal acquisition module are transferred to the first capacitor, so that in the case of non-conducting, the signal in the case of conducting is inputted to the second input terminal and the fourth input terminal of the Gilbert unit.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (14)