Unlock instant, AI-driven research and patent intelligence for your innovation.

BMC signal receiving circuit for USB PD communication and implementation method thereof

A signal receiving and circuit technology, applied in the direction of electrical components, impedance network, multi-terminal network, etc., can solve the problems of BMC signal distortion and large voltage drop of USBCC line, and achieve the effect of simple circuit structure

Pending Publication Date: 2021-08-31
SOUTHCHIP SEMICON TECH SHANGHAI CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the BMC signal transmission process of the integrated circuit USB PD (Power Delivery) communication, as the signal receiving end, it is necessary to receive every bit of the signal accurately, but considering the PD communication, there is a large gap between the power line and the ground line. The current will cause a large voltage drop, which will distort the BMC signal on the USB CC line

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • BMC signal receiving circuit for USB PD communication and implementation method thereof
  • BMC signal receiving circuit for USB PD communication and implementation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0016] Such as figure 1 As shown, the circuit of the present invention is composed of R1, R2, RLPF, CLPF, CHPF, transmission gate and comparator. The CC pin is the BMC signal input, connected to the CLPF through the RLPF, and the other end of the CLPF is grounded to form a low-pass filter network to filter out the high-frequency noise of the BMC signal. The output node of the low-pass filter network is connected to one end of CHPF, and the other end of CHPF is connected to the common node B of resistors R1 and R2. CHPF, R1 and R2 are connected in parallel to form a high-frequency filter network, and the peak-to-peak value Vpeak_ac of the BMC signal is sampled, and then superimposed on on node B. The other end of R2 is grounded, and the other end of R1 is connected to VDD. The voltage VREFL and the voltage VREFH are connected to the negative terminal INN of the com...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of electronic circuits, and particularly relates to a BMC signal receiving circuit for USB PD communication and an implementation method of the BMC signal receiving circuit. The circuit structure is very simple, wherein a band-pass filter sampling method is adopted, a BMC signal on a CC line is sampled, and then the sampled BMC signal is superposed on a common-mode voltage; finally, the common-mode voltage is compared with a reference voltage, the reference voltage is converted into a digital signal, and receiving of the BMC signal is completed. According to the invention, USB PD communication BMC signals under different levels of power transmission conditions can be received, so that PD communication is completed.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits, and in particular relates to a BMC signal receiving circuit for USB PD communication and an implementation method thereof. Background technique [0002] In the BMC signal transmission process of the integrated circuit USB PD (Power Delivery) communication, as the signal receiving end, it is necessary to receive every bit of the signal accurately, but considering the PD communication, there is a large gap between the power line and the ground line. The current will cause a large voltage drop, which will distort the BMC signal on the USB CC line. Contents of the invention [0003] Aiming at the above problems, the present invention proposes a signal receiving circuit capable of accurately receiving BMC signals when different levels of power transmission is performed on a USB interface and an implementation method thereof. [0004] Technical scheme of the present invention is: [000...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/06
CPCH03H7/06
Inventor 肖哲飞
Owner SOUTHCHIP SEMICON TECH SHANGHAI CO LTD