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Comparator circuit and chip comprising same

A comparator circuit and circuit technology, applied in the electronic field, can solve the problem of small input voltage range of the comparator circuit, and achieve the effect of expanding the input voltage range and improving accuracy

Pending Publication Date: 2022-07-01
SHANGHAI BEILING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defect that the input voltage range of the comparator circuit is relatively small due to the connection of a transistor to the comparator circuit in the prior art, and to provide a comparator circuit and a chip containing it

Method used

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  • Comparator circuit and chip comprising same
  • Comparator circuit and chip comprising same
  • Comparator circuit and chip comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] This embodiment provides a comparator circuit, such as figure 1 As shown, it includes: amplifying circuit 1 and comparing circuit 2.

[0066] The amplifier circuit 1 includes a first input pair tube 11 , a second input pair tube 12 , a third input pair tube 13 , a fourth input pair tube 14 , a first amplifying sub-circuit 15 and a second amplifying sub-circuit 16 .

[0067] The first input pair transistor 11 , the second input pair transistor 12 , the third input pair transistor 13 and the fourth input pair transistor 14 all include a PMOS transistor and an NMOS transistor whose gates are connected to each other.

[0068] The output end of the first input pair tube 11 is connected to the first input end of the first amplifier sub-circuit 15, the output end of the second input pair tube 12 is connected to the second input end of the first amplifier sub-circuit 15, and the third input pair The output end of the tube 13 is connected to the first input end of the second am...

Embodiment 2

[0077] A comparator circuit provided in this embodiment is a further improvement to Embodiment 1, such as figure 2 As shown, the amplifying circuit 1 in the comparator circuit of this embodiment includes a first amplifying part 101 and a second amplifying part 102, and the first amplifying part 101 includes a first input pair tube 11, a second input pair tube 12 and a first The amplifying sub-circuit 15 and the second amplifying part 102 include a third input pair of tubes 13 , a fourth input pair of tubes 14 and a second amplifying sub-circuit 16 .

[0078] The first input pair transistor 11 includes a first PMOS transistor Mp1 and a first NMOS transistor Mn1.

[0079] The second input pair transistor 12 includes a second PMOS transistor Mp2 and a second NMOS transistor Mn2.

[0080]The first amplifying sub-circuit 15 includes a third NMOS transistor Mn3, a fourth NMOS transistor Mn4, a fifth NMOS transistor Mn5, a sixth NMOS transistor Mn6, a seventh NMOS transistor Mn7, a...

Embodiment 3

[0130] This embodiment provides a chip, and the chip includes the comparator circuit in Embodiment 1 or Embodiment 2.

[0131] The comparator amplifying circuit sets the first input pair tube, the second input pair tube, the third input pair tube, the fourth input pair tube, the first input pair tube, the second input pair tube, and the third input pair tube in the amplifier circuit. The tube and the fourth input pair tube both include a PMOS tube and an NMOS tube whose gates are connected to each other, and the gates of the PMOS tube and the NMOS tube in the first input pair tube and the fourth input pair tube are both connected to the first input voltage, The gates of the PMOS transistors and the NMOS transistors in the second input pair tube and the third input pair tube are connected to the second input voltage. No matter what the voltage value of the comparator input is, it can always be guaranteed that one transistor in the input pair tube is conductive. The input voltag...

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PUM

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Abstract

The invention discloses a comparator circuit and a chip comprising the same. The comparator circuit comprises an amplifying circuit and a comparison circuit, the amplifying circuit comprises a first input pair transistor, a second input pair transistor, a third input pair transistor, a fourth input pair transistor, a first amplifying sub-circuit and a second amplifying sub-circuit; each of the first input pair transistor, the second input pair transistor, the third input pair transistor and the fourth input pair transistor comprises a PMOS (P-channel Metal Oxide Semiconductor) transistor and an NMOS (N-channel Metal Oxide Semiconductor) transistor, grid electrodes of NMOS transistors in the first input pair transistor and the fourth input pair transistor are connected with a first input voltage, grid electrodes of NMOS transistors in the second input pair transistor and the third input pair transistor are connected with a second input voltage, and the first amplification sub-circuit outputs a first amplification voltage; the second amplification sub-circuit outputs a second amplification voltage; the comparison circuit outputs a comparison result. According to the comparator circuit, the input geminate transistors are arranged, so that the comparator circuit can be conducted no matter how many input voltage values are, and the input voltage range of the comparator circuit is widened.

Description

technical field [0001] The present invention relates to the field of electronic technology, and in particular, to a comparator circuit and a chip including the same. Background technique [0002] The comparator circuit is an important module of the integrated circuit system and is widely used in various integrated circuit systems. In the existing comparator circuit, the input voltage of the comparator circuit is connected to a transistor, and the input voltage of the comparator circuit must be greater than the threshold voltage of the transistor in order for the comparator circuit to output the comparison result normally. Therefore, the minimum value of the input voltage of the comparator circuit To be greater than the threshold voltage of the transistor, the input voltage less than the threshold voltage of the transistor cannot be compared, resulting in a small input voltage range of the comparator circuit. SUMMARY OF THE INVENTION [0003] The technical problem to be so...

Claims

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Application Information

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IPC IPC(8): H03K5/24
CPCH03K5/249
Inventor 李婧
Owner SHANGHAI BEILING