Cascaded time difference amplifier using differential logic delay cell

Digital Pulse-Processing Techniques for X-Ray and Gamma-Ray Semiconductor Detectors

“…Other smart TDA circuit implementations are shown in Figure 5.30 [54]. In these TDAs, the delay-controlled elements of which delay is changed between a slow and fast state are used.…”

A time-domain architecture and design method of high speed A-to-D converters with standard cells

“…The conventional TA as shown in Fig.5(a) weakens the current sources in the opposite buffer chain to amplify the time difference , which is difficult to achieve enough linearity with simple circuit structures [1][2].…”

A 8bit two stage time-to-digital converter using time difference amplifier

“…Our employing TDA consists of the gain control module and the amplify module [5,6]. The closed loop gain control system makes the circuit more stable, and the TD amplify module consists of a delay chain, thus the input range is larger.…”

“…Some TDCs realized sub-gate delay resolution by the Vernier delay line [1], interpolation [2] and a delay line with local passive interpolation [3], however, it is difficult to realize 1 ps resolution with small area and simple processing. Then, time difference amplifiers (TDA) [4,5,6] are an innovative method to improve the time resolution as well as the evolution of the ADCs. TDAs can be a key technique to realize fine time resolution.…”

“…In this paper, we present a 8 bit two stage TDC using a time difference amplifier [6] to realize sub-gate delay resolution [7]. To amplify the time residue of the first stage TDC, the 16× cascaded time difference amplifier (TDA) using differential logic delay cells is employed.…”