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EP-4738708-A1 - ON-DIE HIGH SPEED AND LOW POWER SIGNAL TRANSMISSION CIRCUITRY

EP4738708A1EP 4738708 A1EP4738708 A1EP 4738708A1EP-4738708-A1

Abstract

The present invention provides a circuitry (100, 200, 300) including a driver (114, 214), a band-pass filter (120, 220), a routing trace (130, 230) and at least one receiver (140, 144, 240_1 - 240_N, 244_1 - 244_N) is disclosed. The driver (114, 214) is configured to generate a first signal. The band-pass filter (120, 220) is configured to filters the first signal to generate a second signal. The second signal passes through the routing trace (130, 230) to generate a third signal. The at least one receiver (140, 144, 240_1 - 240_N, 244_1 - 244_N) is configured to receive the third signal to generate an output signal.

Inventors

  • LEE, ZWEI-MEI
  • WANG, Ping-yi

Assignees

  • MEDIATEK INC.

Dates

Publication Date
20260506
Application Date
20250814

Claims (10)

  1. A circuitry (100, 200, 300), comprising: a driver (114, 214), configured to generate a first signal; a band-pass filter (120, 220), configured to filters the first signal to generate a second signal; a routing trace (130, 230), wherein the second signal passes through the routing trace to generate a third signal; and at least one receiver (140, 144, 240_1 - 240_N, 244_1 - 244_N), configured to receive the third signal to generate an output signal.
  2. The circuitry (100, 200, 300) of claim 1, wherein the band-pass filter (120, 220) is a passive band-pass filter.
  3. The circuitry (100, 200, 300) of claim 2, wherein the band-pass filter (120, 220) comprises a resistor, a capacitor and a parasitic capacitor, a first terminal of the resistor is coupled to a first terminal of the capacitor, a second terminal of the resistor is coupled to a second terminal of the capacitor, the first terminals of the resistor and the capacitor are configured to receive the first signal, and the second terminals of the resistor and the capacitor are configured to output the second signal; and the parasitic capacitor is an equivalent parasitic capacitor seen by an output side of the band-pass filter.
  4. The circuitry (100, 200, 300) of any one of claims 1 to 3, wherein the routing trace (130, 230) is directly follows the band-pass filter.
  5. The circuitry (100, 200, 300) of any one of claims 1 to 4, wherein the routing trace (130, 230) is a long metal line fabricated using semiconductor processes, which causes an amplitude of the third signal, generated when the second signal passes through the routing trace, to have a loss of 2dB at its Nyquist frequency.
  6. The circuitry (100, 200, 300) of any one of claims 1 to 5, wherein there is no repeater, buffer and inverter placed on the routing trace (130, 230).
  7. The circuitry (100, 200, 300) of any one of claims 1 to 6, wherein the at least one receiver comprises a self-biased inverter (140, 240_1 - 240_N).
  8. The circuitry (200, 300) of any one of claims 1 to 7, wherein the circuitry (200, 300) comprises multiple receivers (240_1 - 240_N, 244_1 - 244_N), and the multiple receivers (240_1 - 240_N, 244_1 - 244_N) are configured to receive the third signal to generate multiple output signals.
  9. The circuitry (200, 300) of claim 8, wherein output terminals of the multiple receivers (240_1 - 240_N, 244_1 - 244_N) are connected together.
  10. The circuitry (100, 200, 300) of any one of claims 1 to 9, wherein the first signal, the second signal, the third signal and the output signal are a first clock signal, a second clock signal, a third clock signal and an output clock signal, respectively.

Description

Field of the Invention The present invention relates to a transmission circuitry. Background of the Invention In a chip, when high-speed signals pass through a long routing trace, such as high-frequency clock signals transmitted over long-distance traces, they often encounter significant signal loss issues. To maintain signal integrity, conventional technologies typically used larger driver circuits or added multiple repeaters along the long routing traces. However, using larger driver circuits increases power consumption, while adding many repeaters in long-distance traces leads to higher power consumption, as well as issues with delay and jitter. Summary of the Invention Therefore, one objective of the present invention is to propose a circuitry that can maintain the integrity of the signal after long-distance transmission, without the need for larger driver circuits or the addition of numerous repeaters along the long routing traces, thereby solving the above-mentioned problems. This is achieved by a circuitry according to claim 1. The dependent claims pertain to corresponding further developments and improvements. As will be seen more clearly from the detailed description following below, a circuitry comprising a driver, a band-pass filter, a routing trace and at least one receiver is disclosed. The driver is configured to generate a first signal. The band-pass filter is configured to filters the first signal to generate a second signal. The second signal passes through the routing trace to generate a third signal. The at least one receiver is configured to receive the third signal to generate an output signal. Brief Description of the Drawings FIG. 1 is a diagram illustrating a circuitry according to one embodiment of the present invention.FIG. 2 is a diagram illustrating a circuitry according to one embodiment of the present invention.FIG. 3 is a diagram illustrating a circuitry according to one embodiment of the present invention. Detailed Description Certain terms are used throughout the following description and claims to refer to particular system components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This document does not intend to distinguish between components that differ in name but not function. In the following discussion and in the claims, the terms "including" and "comprising" are used in an open-ended fashion, and thus should be interpreted to mean "including, but not limited to ...". The terms "couple" and "couples" are intended to mean either an indirect or a direct electrical connection. Thus, if a first device couples to a second device, that connection may be through a direct electrical connection, or through an indirect electrical connection via other devices and connections. FIG. 1 is a diagram illustrating a circuitry 100 according to one embodiment of the present invention. In this embodiment, the circuitry 100 is a clock signal generation and transmission circuit, and the circuitry 100 is positioned within a chip. As shown in FIG. 1, the circuitry 100 comprises a clock signal generator 110, at least one driver such as two inverters 112 and 114, a band-pass filter 120, a routing trace 130 and a receiver comprising a self-biased inverter 140 and an inverter 144. The band-pass filter 120 is a passive band-pass filter comprising a resistor R1, a capacitor C1 and a parasitic capacitor Cpar, wherein the resistor R1 and the capacitor C1 are connected in parallel, that is a first terminal of the resistor R1 is coupled to a first terminal of the capacitor C1, and a second terminal of the resistor R1 is coupled to a second terminal of the capacitor C1; and the parasitic capacitor Cpar is an equivalent parasitic capacitor seen by the output side of band-pass filter 120. The self-biased inverter 140 comprises an inverter 142 and a resistor R2, wherein a first terminal of the resistor R2 is coupled to an input terminal of the inverter 142, and a second terminal of the resistor R2 is coupled to an output terminal of the inverter 142. In this embodiment, the routing trace 130 is a long interconnect, such as a metal line, more than one millimeter in length (e.g. two millimeters), fabricated using semiconductor processes. In one embodiment, the length of the routing trace 130 causes significant attenuation of the signal as it passes through, for example, the signal passes through the routing trace 130 will have a loss of 2dB or more at its Nyquist frequency. The band-pass filter 120 shown in FIG. 1 is for illustrative, and not a limitation of the present invention. In other embodiments, the band-pass filter 120 can be replaced by an active band-pass filter or a RLC (resistor, inductor and capacitor) band-pass filter. In this embodiment, without a limitation of the present invention, the routing trace 130 directly follows the band-pass filter 120, that is, there is no element intentionally positioned between the routing trace 130 and the