A low noise small area self switched CMOS charge sensitive readout chain

A CMOS charge sensitive readout chain with self switched output and small layout area, suitable for pixel applications, has been developed. The system is capable of simultaneous position sensing and energy measurement on a real time basis. Each pixel circuit incorporates both analog and digital features to perform the dual task. The performance of several charge amplifiers was tested. The impact of type and channel length of the input transistor on the system noise was investigated. The read out electronics have been designed and fabricated in CMOS 0.8 /spl mu/m technology. The overall gain of the chain is 620 mV/fC, while the ENC is 58 e rms at a 140 nsec shaping time and a 105 fF detector capacitance. With a power consumption of 1.8 mW per pixel at 3.3 V, it is a promising solution for X-ray pixel detectors. The paper describes the system architecture and reports experimental measurements.

[1]  Pierre Jarron,et al.  Amplex, a low-noise, low-power analog CMOS signal processor for multi-element silicon particle detectors , 1990 .

[2]  Willy Sansen,et al.  Limits of low noise performance of detector readout front ends in CMOS technology , 1990 .

[3]  D. M. Raymond,et al.  A Prototype pixel readout chip for asynchronous detection applications , 1991 .

[4]  A sparse data scan circuit for pixel detector readout , 1992 .

[5]  S. Kavadias,et al.  Calculation of pixel detector capacitances through three dimensional numerical solution of the Laplace equation , 1994 .

[6]  F. Krummenacher,et al.  Development of a pixel readout chip compatible with large area coverage , 1994 .

[7]  S. Masciocchi,et al.  VIKING, a CMOS low noise monolithic 128 channel frontend for Si-strip detector readout , 1994 .

[8]  H. B. Barber,et al.  Semiconductor arrays with multiplexer readout for gamma-ray imaging: results for a 48 × 48 Ge array , 1994 .

[9]  Multiplexed readout electronics for imaging spectroscopy of high-energy X-ray and gamma photons , 1994 .

[10]  Design and performance of an analogue VLSI cell for pixel detector readout: ANAPIX , 1995 .

[11]  Design and Performance of an Analogue VLSI Cell for Pixel Detector Readout: ANAPIX CERN R&D 19 Collaboration - I.N.F.N. Aspide project , 1995 .

[12]  S. Adachi,et al.  A CMOS detector readout front-end for X-ray digital radiography systems , 1996 .

[13]  L. Gustafsson,et al.  A 64-channel pixel readout chip for dynamic X-ray imaging , 1996, 1996 IEEE Nuclear Science Symposium. Conference Record.

[14]  Paul Seller,et al.  A 16-channel continuous charge amplifier with sparse readout , 1996 .

[15]  E. Beuville,et al.  A "Winner-Take-All" IC for determining the crystal of interaction in PET detectors , 1996 .

[16]  Yann Hu,et al.  Design of a low noise, low power consumption CMOS preamplifier shaper for readout of microstrip detectors in the DMILL radiation hardened process and irradiation measurements , 1996 .

[17]  N. Haralabidis,et al.  A transimpedance CMOS multichannel amplifier with a 50 /spl Omega/-wide output range buffer for high counting rate applications , 1997 .

[18]  A. Breskin.  Photon detectors for the 21st century , 1997 .

[19]  G. Meddeler,et al.  A Readout Chip for a 64 x 64 Pixel Matrix with 15-bit Single Photon Counting* , 1997 .

[20]  Peter Weilhammer,et al.  A BIOSCOPE SYSTEM USING DOUBLE-SIDED SILICON STRIP DETECTORS AND SELF-TRIGGERING READ-OUT CHIPS , 1997 .

[21]  A. H. Walenta,et al.  Calculation of pile-up effects in X-ray detection with large area circular silicon drift detectors , 1998 .

[22]  P. Fessler,et al.  An important step forward in continuous spectroscopic imaging of ionising radiations using ASICs , 1999 .