A Flash TDC with 2.6-4.2 ps Resolution Using a Group of UnbalancedCMOS Arbiters

作者：Komatsuta Satoshi^*; Yamaguchi Takahiro J; Abbas Mohamed; Nguyen Ngoc Mai Khanh; Tandon James; Asada Kunihiro

来源：IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2014, E97A(3): 777-780.

DOI：10.1587/transfun.E97.A.777

• flash TDC
• arbiter
• slope control

This paper proposes a new flash time-to-digital converter (TDC) circuit which exploits unbalanced arbiters to integrate intrinsic delay offsets into the decision elements. The unbalanced arbiters are implemented with cross-coupled standard NAND cells and the combination of the NAND cells decides the timing offset between two input signals. Simulations and measurements are conducted to validate the new circuit, which provides variable time difference ranges by controlling the slope of input signals. Since the proposed flash TDC uses only NAND cells in a standard cell library for the arbiters which easily enables the TDC to be used as a soft macro in a typical digital circuit design flow.

• 出版日期2014-3