کنفرانس بین المللی میکروالکترونیک ایران

صفحه اصلی / هفتمین کنفرانس بین المللی میکروالکترونیک ایران

Design of a time difference amplifier using phase-locked loop circuit blocks

نویسندگان :

Sina Bakhshi¹ Mehdi Ehsanian²

1- دانشگاه صنعتی خواجه نصیرالدین طوسی 2- دانشگاه صنعتی خواجه نصیرالدین طوسی

کلمات کلیدی :

time difference amplifier (TDA)،time amplifier (TA)،phase-locked loop (PLL)،time difference circuit،time-domain processing

چکیده :

This paper presents a novel time difference amplifier architecture, implemented by repurposing functional blocks from a phase-locked loop (PLL) circuit. In the proposed design, the phase–frequency detector and charge pump operate in a manner analogous to their roles within a conventional PLL, but are reconfigured to realize time-domain signal amplification. The circuit is implemented in 180 nm CMOS technology (TSMC) with a 1.8 V supply voltage. The amplifier achieves an input dynamic range from 20 ns to 250 ns, with a gain error ranging from –10.8% to +9.23% over this interval. The time gain is tunable between 3 and 9, enabling classification of the design as a variable-gain time difference amplifier. At an operating frequency of 100 MHz, the proposed circuit consumes only 1.14 mW, making it suitable for time-domain processing applications.