Readout integrated circuit for MIR detector within ASPIC
Paweł Pieńczuk
supervisor: Witold Pleskacz
Under the MIRPIC project, the consortium designs the know-how for Application-Specific Photonic Integrated Circuits (ASPIC) for mid-infrared (MIR, 3-8 μm). MIR photonics is promising in the gas and complex chemical compound sensing. One of the last blocks is the Readout Integrated Circuit (ROIC), which converts the signal from the MIR detector to the output voltage. This ROIC will be integrated within the ASPIC package by the need for miniaturization. The ROIC unit (depicted in Fig. 1) is based on a transimpedance amplifier (TIA), which converts the input current signal to the output voltage. The TIA is based on a fully differential amplifier (FDA), which can result in high speed and external noise rejection. The TIA unit is followed by 50 Ohm output buffer (OUT_BUF). Both blocks are polarized by configurable biasing block (BIAS).
Fig. 1 ROIC scheme block (left) and layout (right).
The layout (Fig. 1) is created and sent to production in CMOS 180 nm process. The simulations after parasitic extraction show promising results of parameters. This has to be proved by experimental tests in the lab, with text fixture under development (Fig.2).
Fig. 2 ROIC scheme block (left) and layout (right).
This work has been supported by the National Centre for Research and Development, project "Photonic Integrated Circuits Technologies for mid-IR", MIRPIC (TECHMATSTRATEG III/0026/2019)).