Difference interface circuit for on-chip long lines interlinkage

Abstract

The invention discloses a differential interface circuit used in the interconnection of long on-chip wires, which is mainly solves the power consumption problem of the interconnection of the long on-chip wires. The structure of the circuit comprises a transmitter, a long interconnection wire and a receiver; wherein, the transmitter consists of an inverter (A1) and an MOS current-mode logic circuit, the transmitter used for converting the full-swing signals on chips into low-swing signals; the receiver is formed by connecting a sensitive amplifier (G), a second inverter (A2) and a third inverter (A3), the receiver is used for restoring the low-swing signals on the longer interconnection wires to the full-swing signals. The differential interface circuit of the invention can effectively reduce the power consumption of interconnection of the long on-chip wires without under the condition of introducing the external reference voltages and can be used in the long wire interconnection of system on chip (SOC) of the integrated circuit design.

Description

technical field [0001] The invention belongs to the technical field of microelectronics and relates to an integrated circuit, in particular to a differential interface circuit, which can be used for long-line interconnection of a system on chip SoC in integrated circuit design. Background technique [0002] With the continuous improvement of integrated circuit manufacturing technology, the geometric size of transistors is continuously reduced, and the number of transistors that can be integrated per unit area is continuously increased. Therefore, power consumption has increasingly become an important constraint for integrated circuit design. The low-swing and low-power differential interface circuit interconnected on-chip with long wires belongs to the low-power CMOS system-on-chip SoC, which has an important impact on the overall performance of the integrated circuit. Especially after the CMOS process enters the deep submicron stage, on-chip interconnection faces severe cha...

AI Technical Summary

Problems solved by technology

The DIFF differential low-swing interface circuit uses differential signals to transmit on the interconnection line, which improves the signal's ability to resist noise, so it can reduce the signal swing to a very low level, but it still needs to introduce a reference voltage to obtain a low voltage swing

[0013] In summary, the current research on low-swing interconnection interface circuits mainly focuses on the identification and recovery of low-swing signals, and the transmitter generally uses differential cascaded inverters to drive interconnection lines. The biggest disadvantage of the method is that it is necessary to introduce an additional reference voltage generating circuit in the chip to provide it with a lower voltage value, which leads to circuit complexity and increases power consumption

Images