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BMC signal sending device for USB PD communication

A signal transmission device and voltage signal technology, applied in the direction of logic circuit interface device, logic circuit connection/interface arrangement, instrument, etc., can solve the problems of difficulty in implementation, high cost, difficulty in wide-scale promotion, etc., and achieve easy integration , debugging is flexible and simple, and the effect of good market application value

Pending Publication Date: 2016-10-26
ZHUHAI ISMARTWARE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This communication method uses the power line as the signal transmission channel, which requires AC coupling and impedance isolation, which is costly and difficult to implement, making it difficult to be widely promoted.

Method used

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  • BMC signal sending device for USB PD communication
  • BMC signal sending device for USB PD communication
  • BMC signal sending device for USB PD communication

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0032] Specific embodiment one: such as figure 2 As shown, the circuit of the signal amplitude setting module and the conversion rate control module includes a first amplifier OP1, a first NMOS tube NM1, a first resistor R1, a second resistor R2, a first capacitor C1, and a first PMOS tube forming a negative feedback loop. PM1, the second PMOS tube PM2, the third PMOS tube PM3, the second NMOS tube NM2, the third NMOS tube NM3, the first switch S1, the second switch S2 and the second capacitor C2. The non-inverting terminal of OP1 is connected to the external reference voltage vref , The output terminal is connected to the gate of NM1, the drain of NM1 is connected to the power supply, the source is connected in series with R2 and R1, the other end of R1 is grounded, the negative phase end of OP1 is connected to the line between R1 and R2, the first end of C1 Connect the OP1 output terminal, the second terminal of C1 is grounded, the source of PM1, the source of PM2 and the sou...

specific Embodiment 2

[0036] Specific embodiment two: such as Figure 4 As shown, the circuit of the signal amplitude setting module and the conversion rate control module includes a third amplifier OP3, a sixth PMOS tube PM6, a seventh PMOS tube PM7, an eighth PMOS tube PM8, a ninth PMOS tube PM9, and a sixth NMOS tube NM6, The seventh NMOS tube NM7, the fourth capacitor C4, the fifth capacitor C5, the fifth resistor R5, the sixth resistor R6, the third switch S3, and the fourth switch S4. The non-phase terminal of OP3 is connected to the external reference voltage vdd- relative to the power supply. vref, the output terminal is connected to the PM6 grid, the PM6 source is connected in series with R6 and R5, the other end of R5 is connected to the power source, the PM6 drain is grounded, the negative phase terminal of OP3 is connected to the connection line of R5 and R6, and the output terminal of OP3 is also connected to C4 The first end, the other end of C4 is connected to the power supply, PM7 sou...

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Abstract

The invention discloses a BMC signal sending device for USB PD communication. The device comprises a signal amplitude setting module, a conversion rate control module, a voltage-current conversion module and a sending driving module which are connected in sequence. The signal amplitude setting module is used for setting the voltage amplitude of a BMC sending signal and generating a first voltage signal; the conversion speed control module is used for controlling the high-low level conversion speed of the first voltage signal and generating a second voltage signal with the amplitude same as that of the first voltage signal and the conversion speed different from that of the first voltage signal; the voltage-current conversion module is used for converting the second voltage signal into a current signal; the sending driving module is used for converting the current signal into a BMC sending signal and transmitting the BMC sending signal to a CC line. The BMC signal sending device conforming to USB PD and USB Type-C protocol specifications is provided for USB PD communication of electronic equipment with a USB Type-C interface, the device is low in design technology limit and flexible and easy to debug; in addition, the device can be integrated to a silicon wafer easily, no any off-chip element is needed, and therefore the device has the good market application value.

Description

Technical field [0001] The present invention relates to the technical field of USB power supply and serial communication, in particular to a BMC signal sending device for USB PD communication. Background technique [0002] With the development of electronic technology, the role of the USB interface in electronic devices has also evolved. In the early days of its birth, the USB interface used data transmission as its main function, with extremely limited power supply capabilities. But now, the power transmission of USB has risen to the same important position as data transmission. USB has gradually become a standard configuration interface for electronic devices. Every day, hundreds of millions of portable electronic products, MP3 players, smart phones, tablets and smart wearable devices, etc., obtain power through the USB interface. [0003] From USB 1.0 to USB BC 1.2, the power supply capability of the USB interface has also increased from 5V / 500mA to 5V / 1.5A, meeting the power...

Claims

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Application Information

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IPC IPC(8): G06F13/40G06F13/42H03K19/0175
CPCH03K19/017509G06F13/4004G06F13/4282
Inventor 梁源超邓琴
Owner ZHUHAI ISMARTWARE TECH CO LTD
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