... Radio emission at around 90 GHz from star-forming galaxies is expected to be strongly dominated by the free-free component due to ionising radiation from massive, short-lived, stars. We present high surface-brightness sensitivity observations at 90 GHz of the nearby star-forming galaxy Messier 66 with resolution of about 9 arcsec (corresponding to a physical scale of about 500 pc) and analyse these observations in combination with archival lower frequency radio and mid-infrared measurements. ...

... The design employs a differential structure. ... The input is adapted to 100 differential, and the outputs use standard Low Voltage Differential Signaling (LVDS). ... T/H SINGLE T/H Single Input T/H Single Output 1.35 0.15 0.2 T/H DIFFERENTIAL Input T/H Output T/H 0.1 1.3 0.05 volts volts Figure 5: Digital part and digital gate 0 1.25 -0.05 -0.1 1.2 Integrated Test System A test system is integrated on chip to evaluate the transmission to the data acquisition card (fig: 7). ...