CN220457381U - IC chip with built-in multiple reference voltage comparators - Google Patents

Abstract

The utility model discloses an IC chip with various built-in reference voltage comparators, which comprises a comparator CMP, wherein the reverse input end of the comparator CMP is connected with a first data selector MUX 1; the non-inverting input terminal of the comparator CMP is connected with the second data selector MUX 2; the input end of the first data selector MUX1 is respectively connected with the non-inverting input ends CON, VDD 2/3, the built-in reference level VREF_LVD and GND; the input end of the second data selector MUX2 is respectively connected with the inverting input ends COP, VDD 2/3 and the built-in reference levels VREF_LVD and GND; the output end of the comparator CMP outputs result data to the filter; the filter performs filtering processing on the received data and then transmits the data to the controller; the controller outputs the comparison result data to an external circuit. According to the utility model, the comparator is integrated in the IC chip, and a user can directly compare the size of the input source by configuring the built-in comparator control register of the comparator without externally connecting a comparator circuit.

Description

IC chip with built-in multiple reference voltage comparators

Technical Field

The utility model belongs to the technical field of IC chips, and particularly relates to an IC chip with a plurality of built-in reference voltage comparators.

Background

A voltage comparator (hereinafter referred to as a comparator) is a commonly used integrated circuit. The device can be used for alarm circuits, automatic control circuits and measurement technologies, and also can be used for V/F conversion circuits, A/D conversion circuits, high-speed sampling circuits, power supply voltage monitoring circuits, oscillators, voltage-controlled oscillator circuits, zero-crossing detection circuits and the like. The voltage comparator has the function of comparing the magnitudes of two analog signals and outputting a high level or a low level at an output terminal in a binary signal. The comparator is used as an integrated operational amplifier nonlinear application circuit, is commonly used in various electronic equipment, has high sensitivity, and can not be accurately compared due to poor anti-interference capability caused by the fact that external voltages are required to be input at two ends for comparison.

Disclosure of Invention

The utility model aims to provide an IC chip with various built-in reference voltage comparators, by integrating the comparators in the IC chip, a user can directly compare the sizes of input sources by configuring built-in comparator control registers without externally connecting a comparator circuit, and in the comparator, the user can configure the reference level threshold value in the comparator by himself, thereby bringing great convenience for the user to design the circuit and greatly reducing the interference of external circuits.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model is an IC chip with various built-in reference voltage comparators, including a comparator CMP, the reverse input end of the comparator CMP is connected with a first data selector MUX 1; the non-inverting input end of the comparator CMP is connected with the second data selector MUX 2; the input end of the first data selector MUX1 is respectively connected with the non-inverting input ends CON, VDD 2/3, the built-in reference level VREF_LVD and GND; the input end of the second data selector MUX2 is respectively connected with the inverting input ends COP, VDD 2/3, the built-in reference level VREF_LVD and GND; the output end of the comparator CMP outputs result data to the filter; the filter performs filtering processing on the received data and then transmits the data to the controller; the controller outputs comparison result data to an external circuit.

Further, the range of the built-in reference level VREF_LVD is 1.15V-2.70V, one gear per 0.05V.

Further, the first data selector MUX1 and the second data selector MUX2 perform parameter configuration by configuring CNS [1:0] and CPS [1:0] bits.

Further, the filter outputs the unstable signal to the comparator interrupt or port after filtering.

The utility model has the following beneficial effects:

the utility model integrates the comparator into the IC chip, a user can directly compare the size of the input source by configuring the built-in comparator control register without externally connecting a comparator circuit, and the user can configure the internal reference level threshold value of the comparator in the comparator by himself, thereby bringing great convenience for the user to design the circuit and greatly reducing the interference of the external circuit.

Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an IC chip with various built-in reference voltage comparators;

fig. 2 is a schematic diagram of an IC chip with various built-in reference voltage comparators.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, the present utility model is an IC chip with a plurality of reference voltage comparators, and the model number is M8P831; the data processing circuit comprises a comparator CMP, wherein an inverting input end of the comparator CMP is connected with a first data selector MUX 1; the non-inverting input terminal of the comparator CMP is connected with the second data selector MUX 2; the first data selector MUX1 and the second data selector MUX2 perform parameter configuration by configuring CNS [1:0] and CPS [1:0] bits;

the input end of the first data selector MUX1 is respectively connected with the non-inverting input ends CON, VDD 2/3, the built-in reference level VREF_LVD and GND; the input end of the second data selector MUX2 is respectively connected with the inverting input ends COP, VDD 2/3 and the built-in reference levels VREF_LVD and GND; the range of the built-in reference level VREF_LVD is 1.15V-2.70V, and each 0.05V is one gear, so that the user can freely configure the internal reference level of the IC for selection;

the output end of the comparator CMP outputs result data to the filter; the filter performs filtering processing on the received data and then transmits the data to the controller; the controller outputs the comparison result data to an external circuit.

Fig. 2 is a schematic diagram of a comparator, in which GND, VREF reference voltages, vin and VDD x 2/3 are voltage input port modules, and the comparator can select a voltage input port to output the result to a filter circuit through a voltage comparison circuit, and the filter circuit filters an unstable signal and outputs the unstable signal to a comparator interrupt or port.

The user can freely configure the normal phase input end (COP) to output from the port, so that the internal signal of the normal phase input end (COP) can be measured in the actual application circuit, and the normal phase input end (COP) is more flexible in the actual application of the user. In the comparator, a user can configure the reference level threshold value in the comparator by himself, so that great convenience is brought to the user for designing the circuit, and the interference of an external circuit is reduced to a great extent.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims (4)

1. An IC chip with a plurality of reference voltage comparators built therein, characterized in that: comprises a comparator CMP, wherein the inverting input end of the comparator CMP is connected with a first data selector MUX 1; the non-inverting input end of the comparator CMP is connected with the second data selector MUX 2;

the input end of the first data selector MUX1 is respectively connected with the non-inverting input ends CON, VDD 2/3, the built-in reference level VREF_LVD and GND;

the input end of the second data selector MUX2 is respectively connected with the inverting input ends COP, VDD 2/3, the built-in reference level VREF_LVD and GND;

the output end of the comparator CMP outputs result data to the filter; the filter performs filtering processing on the received data and then transmits the data to the controller; the controller outputs comparison result data to an external circuit.

2. The IC chip of claim 1 wherein said built-in reference level vref_lvd is in the range of 1.15V-2.70V, one step per 0.05V.

3. An IC chip incorporating multiple reference voltage comparators according to claim 1, wherein the first data selector MUX1 and the second data selector MUX2 are parameter configured by configuring CNS [1:0] and CPS [1:0] bits.

4. The IC chip of claim 1 wherein the filter filters the unstable signal and outputs it to the comparator interrupt or port.