KR-20260065302-A - LOW VOLTAGE TRANSMIT APPARATUS

KR20260065302AKR 20260065302 AKR20260065302 AKR 20260065302AKR-20260065302-A

Abstract

The present invention relates to a low-voltage transmission device. A low-voltage transmission device according to an embodiment of the present invention comprises a low-voltage driver that outputs a differential signal based on a data signal, a plurality of feedforward capacitors that generate a ripple signal based on a data signal, and a plurality of variable resistors that correct the differential signal by controlling the peak value and frequency of the ripple signal. A data signal may be input to one end of each of the plurality of feedforward capacitors, one end of each of the plurality of variable resistors may be connected in series to the other end of each of the plurality of feedforward capacitors, and the output terminal of the low-voltage driver may be connected to the other end of each of the plurality of variable resistors.

Inventors

김영동
오영훈
박정민
정선화
김진석
엄기윤

Assignees

주식회사 유니컨

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (10)

A low-voltage driver that outputs a differential signal based on a data signal; A plurality of feed-forward capacitors that generate a ripple signal based on the above data signal; and It includes a plurality of variable resistors that correct the differential signal by controlling the peak value and frequency of the ripple signal, and The data signal is input to one end of each of the plurality of feedforward capacitors, and One end of each of the plurality of variable resistors is connected in series to the other end of each of the plurality of feedforward capacitors, and A low-voltage transmitting device in which the output terminal of the low-voltage driver is connected to the other end of each of the plurality of variable resistors.
In paragraph 1, It further includes a plurality of switches that control the operation of the plurality of feedforward capacitors and the plurality of variable resistors, and One end of each of the plurality of switches is connected in series to the other end of each of the plurality of feedforward capacitors, and A low-voltage transmitting device in which one end of each of the plurality of variable resistors is connected in series to the other end of each of the plurality of switches.
In paragraph 2, The above plurality of feedforward capacitors includes a first feedforward capacitor and a second feedforward capacitor, and When a high level of the data signal is input to the first feedforward capacitor, A low-voltage transmitting device in which the low level of the data signal is input to the second feed-forward capacitor.
In paragraph 3, The above plurality of variable resistors includes a first variable resistor and a second variable resistor, and The first variable resistor is connected in series with the first feedforward capacitor, and A low-voltage transmitting device in which the second variable resistor is connected in series with the second feed-forward capacitor.
In paragraph 4, The above plurality of switches includes a first switch and a second switch, and The first switch is positioned between the first feedforward capacitor and the first variable resistor and is connected in series, and A low-voltage transmitting device in which the second switch is located between the second feed-forward capacitor and the second variable resistor and connected in series.
In paragraph 1, A low-voltage transmitting device in which the above plurality of variable resistors control the zero point based on the ripple signal.
In paragraph 6, When the resistance value of the plurality of variable resistors increases, the zero point is formed at a reduced frequency, and A low-voltage transmitting device in which, when the resistance value of the plurality of variable resistors decreases, the zero point is formed at an increased frequency.
In paragraph 1, The above low-voltage driver is, It includes a first transistor, a second transistor, a third transistor, and a fourth transistor, and The same input is applied to the gate of the first transistor and the gate of the second transistor, and The same input is applied to the gate of the third transistor and the gate of the fourth transistor, and The source of the first transistor and the drain of the third transistor are connected to the same output node, and A low-voltage transmitting device in which the drain of the second transistor and the source of the fourth transistor are connected to the same output node.
In paragraph 2, When the above plurality of switches are turned off, A low-voltage transmitting device in which the plurality of feed-forward capacitors and the plurality of variable resistors are open.
In Paragraph 9, A low-voltage transmitting device in which the plurality of switches include at least one MOSFET element.

Description

Low Voltage Transmit Apparatus The present invention relates to a low-voltage transmitting device, and more specifically, to a low-voltage transmitting device comprising a low-voltage driver that reduces the influence of parasitic components on a data signal. Differential signal transmission is a method in which the transmitter transmits two signals with complementary values (signals with a 180-degree phase difference), and the receiver reconstructs data using the difference between the two. Signal transmission based on differential signal transmission is robust against data distortion caused by externally applied electrical noise or internally generated power switching noise. Due to these advantages, it has been adopted and used in numerous high-speed data communication standards. For example, new interface technologies including Low Voltage Differential Signaling (LVDS), Reduced Swing Differential Signaling (RSDS), and Scalable Low Voltage Signaling (SLBS) offer fast bit rates, lower power consumption, and superior noise characteristics. In particular, the SLVS method is being used as an interface technology for transmitting and receiving high-speed data between chips. The SLVS method can operate at lower voltages and lower currents than the Low Voltage Differential Signaling (LVDS) method. Accordingly, the SLVS method is gaining popularity in high-speed data transmission and reception devices. However, since the SLVS method operates based on voltage, it is necessary to correct the output impedance to ensure accurate output impedance. For example, various transmit/receive drivers may be used in data transmission and reception devices. In this case, the driver transmitting data may be affected by parasitic resistance and parasitic capacitance caused by the package substrate, package balls, PCB lines, connectors, cables, etc. In other words, when data is transmitted and received between transmit/receive chips, parasitic components can affect the data signal transmitted by the driver at the transmitting end due to parasitic resistance and parasitic capacitance. Due to the aforementioned data loss, the data transmission speed, transmission efficiency, and transmission distance of the data transmission and reception device may be degraded. Furthermore, problems may arise where the data signal is unclear due to noise or data loss during data transmission. To solve the aforementioned problems, there is a need for technology to correct data signals that are lost due to parasitic components or have noise superimposed on them. Conventional data transmission and reception devices corrected the data signal at the receiving end, including the receiver, to minimize noise or jitter in the data signal caused by parasitic components. For example, conventionally, a technique was used to correct the peak value of the data signal received by the receiver. Furthermore, technology for correcting data signals is also being developed at the transmitting end of data transmission and reception devices. However, transmitters require a separate clock signal to synchronize input and output data signals, which complicates the transmitter's structure. Consequently, there is a problem in that additional power is consumed to operate this complex transmitter structure. In order to solve the aforementioned problem, a low-voltage transmitting device according to the present invention will be described below. Meanwhile, the aforementioned background technology is technical information that the inventor possessed for the derivation of the present invention or acquired during the process of deriving the present invention, and it cannot be considered as prior art disclosed to the general public prior to the filing of the present invention. FIG. 1 is a schematic circuit diagram showing a data transmission and reception device according to one embodiment of the present invention. FIG. 2 is an exemplary circuit diagram of a low-voltage transmitting device including a low-voltage driver according to one embodiment of the present invention. FIG. 3 is an exemplary circuit diagram of a data transmission and reception device including a low-voltage driver in voltage mode according to an embodiment of the present invention. FIG. 4 is an exemplary circuit diagram of a data transmission and reception device including a low-voltage driver in current mode according to an embodiment of the present invention. FIG. 5 is an example of an output for a low-voltage transmitting device including a low-voltage driver according to an embodiment of the present invention. FIGS. 6a and FIGS. 6b are examples of outputs for a data transmission and reception device including a low-voltage transmission device according to an embodiment of the present invention. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, th