Custom integrated circuit design for ultrasonic therapeutic CMUT array
This paper presents the design of a highly flexible and programmable transmit beam-former ASIC using a high voltage (HV) 0.35 μm CMOS technology to be flip-chip bonded to a 4 × 4 CMUT array for ultrasound therapeutic applications. However, proposed IC can be used as a transmitter circuitry in color Doppler 3D imaging applications. In our proposed chip, each CMUT element is provided by an 8-bit shift register, an 8-bit comparator, a one-shot circuit with adjustable pulse width, a programmable pulse train generator and a HV pulser circuit. The interface electronics can generate two types of outputs with programmable focusing delays to 16 ultrasound transducer elements in different modes: The first mode is for generating single pulses in which the one-shot circuits adjust the width of the pulses from a few nanoseconds to 650 ns with enough resolution for different operating frequencies of ultrasound transducer. The second one has been considered for generating controllable pulse trains with output frequencies in the range of 1–10 MHz. At final stage the amplitudes of single pulses or pulse trains are increased up to 45 V using HV pulsers. Using an external control system like FPGA, the pulser circuit fires correspondent CMUT element when its stored shift register value is identical with the value of global counter.
This work is in part supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under Grant 110E072.
- Buyle J, De Gezelle V, Bakeroot B, Doutreloigne J (2008) A new type of level-shifter for n-type high side switches used in high-voltage switching ADSL line-drivers. In: Electronics, Circuits and Systems, 2008. ICECS 2008. 15th IEEE International Conference on, Issue Date: 31 Aug 2008-3 Sep 2008, pp 954–957Google Scholar
- Chebli R, Sawan M, Savaria Y, El-Sankary K (2007) High-voltage DMOS integrated circuits with floating gate protection technique. IEEE in Proc Int Symp Circuits Syst 3343–3346Google Scholar
- Declerq MJ, Schubert M, Clement F (1993) 5 V-to-75 V CMOS output interface circuits. In: IEEE 40th International Conference Solid-State Circuits, Digest of Technical Papers, pp 162–163, Feb 1993Google Scholar
- Doutreloigne J (2006) A fully integrated ultra-low-power high-voltage driver for bistable LCDs. IEEE Proc Int Symp VLSI Des Autom Test, pp 267–270Google Scholar
- Doutreloigne J, De Smet H, Van den Steen J, Van Doorselaer G (1999) Low-power high-voltage cmos level-shifters for liquid crystal display drivers. In: IEEE in Proceedings 11th International Conference Microelectronics (ICM’99) pp 213–216, Nov 1999Google Scholar
- Ebbini ES, Seip R, Vanbaren P, Haddadin O, Simon C, Botros YY (1999) Therapeutic ultrasound. In: Webster J (ed) Wiley Encyclopedia of Electrical and Electronics Engineering. Wiley, New YorkGoogle Scholar
- Khorasani M, van den Berg L, Marshall P, Zargham M, Gaudet V, Elliott D, MartelS (2008) Low-power static and dynamic high-voltage cmos level-shifter circuits. IEEE Int Symp Circuits Syst, pp 1946–1949Google Scholar
- Maymandi-Nejad M, Sachdev M (2005) A monotonic digitally controlled delay element. IEEE J 40(11):2212–2219Google Scholar
- Pan D, Li HW, Wilamowski BM (2003) A low voltage to high voltage level shifter circuit for MEMS application. In: IEEE in Proceedings 15th Biennial University/Government/Industry Microelectronics Symposium, pp 128–131, July 2003Google Scholar
- Park W-K, Cha C-U, Lee S-C (2006) A novel level-shifter circuit design for display panel driver. In: IEEE 49th International in Midwest Symposium Circuits and Systems, vol 2, pp 391–394, Aug. 2006Google Scholar
- Rossberg M, Vogler B, Herzer R (2007) 600 V SOI gate driver ic with advanced level shifter concepts for medium and high power applications. IEEE Proc Conf Power Electron Appl, pp 1–8Google Scholar
- Serneels B, Steyaert M, Dehaene W (2006) A high speed, low voltage to high voltage level shifter in standard 1.2 V 0.13 μm CMOS. IEEE Proc Int Conf Electron Circuits Syst 668–671Google Scholar