Title :
A high resolution time-to-digital converter for ultrasonic flow measurement
Author :
Riedel, F. ; Eusemann, R.
Author_Institution :
Siemens Metering AG, Zug, Switzerland
Abstract :
A 3.6 V analog low power time-to-digital converter (TDC) with a resolution of 10 ps and dynamics of 18 bit has been developed. For time differences Δt ≤ 10 ns, the non-linearity error is less than ±12 ps at σ<25 ps. The measuring time is 1 ms, independent of the input time difference. The TDC is produced in a 2µm CMOS low threshold voltage process.
Keywords :
Acoustic transducers; CMOS process; Fluid flow measurement; Niobium; Switches; Threshold voltage; Time measurement; Ultrasonic transducers; Ultrasonic variables measurement; Velocity measurement;
Conference_Titel :
Solid-State Circuits Conference, 1999. ESSCIRC '99. Proceedings of the 25th European
Conference_Location :
Duisburg, Germany
