Gossipo-3: a test of a 1-ns TDC-per-pixel and an integrated Temp-sensor in a 0.13um CMOS technology. Christoph Brezina 2 , Klaus Desch 2 , Harry van der Graaf 1 , Vladimir Gromov 1 , Ruud Kluit 1 , Andre Kruth 2
Gossipo-3: a test of a 1-ns TDC-per-pixel and an integrated Temp-sensor in a 0.13um CMOS technology
Christoph Brezina2, Klaus Desch2 , Harry van der Graaf 1, Vladimir Gromov 1, Ruud Kluit 1, Andre Kruth2
1National Institute for Subatomic Physics (Nikhef), 1098 XG Amsterdam, the Netherlands,
2Institute of Physics, Bonn University, D-53115, Germany.
In a joint effort of Nikhef (Amsterdam) and University of Bonn, the Gossipo-3 MPW test chip is being developed in which preamp-shaper-discriminator circuitry is being evaluated, as well as the performance of a low-power TDC-per-pixel circuit with a resolution of 1 ns. In another development, an on-chip temperature sensor is being designed, as an evolution of the previously realized CMOS bandgap reference.
Micro-Pattern Gas Detectors : the read-out
Gossipo-3: MPW prototype
Cathode (drift) plane
1mm … 30cm
Front-end Readout Chip
On-pixel fast oscillator
0ns…Tslow (25 ns)
Tfast (1.8 ns)
Gossipo-3: the pixel
Delay = Tfast/2 = Function (Temp, Vdd)
0…15 (4-bit TDC)
4 bit Fast counter
2% / 10 ◦C
4 bit ToT counter
- 12% / 100mV
Channel-to-channel statistical spread is 4%
8 bit Slow counter
Power supply voltage, Volts
1-4 bit ovfl.
∆ VDD < 50 mV
∆ TEMP < 30◦ C
accumulated error < 6% (1.8 ns or 1 TDC)
6 bit Pixel configuration
On-chip Temperature Sensor 
reset (once per sample)
bit stream ~ Itemp / Iref
Data read-out Phase (LFSR = Shift Registers)
Data taking phase (LFSR = Counter)
Σ∆ analog-to-digital converter
A Radiation Hard Bandgap Reference Circuit (featuring DTMOST’s) 
. a small-size (1mm2) MPW prototype chip: individual basic circuits (preamplifier, discriminator, local oscillator, TDC)
. tape-out: July 11, 2009
. a large-size (13.6mm2) MPW prototype chip: 32x32 pixels array with required periphery circuits.
. tape-out: November 9, 2009
 V.Gromov, R.Kluit, H. van derGraaf ”Development of a Front-end Pixel chip for Readout of Micro-Pattern Gas Detectors” Proceeding of Topical Workshop on Electronics for Particle Physics (TWEPP-08), pp.76-79, Naxos, Greece, September 2008.
 A. Bakker and J.H.Huijsing “Micropower CMOS Temperature Sensor with Digital Output”, IEEE Journal of Solid-State Circuits, Vol.31, No7, July 1996.
 V.Gromov, A.J. Annema, R. Kluit et al., “A Radiation Hard Bandgap Reference Circuit in a Standard 0.13um CMOS Technology,” IEEE Transactions on Nuclear Science, vol.54, issue 6, pp. 2727-2733, Dec. 2007.