The LT3905 from Linear Technology is a fixed frequency, current-mode step-up DC/DC converter designed to bias avalanche photodiodes (APD) in optical receivers. The LT3905 features high side APD current monitoring with over five decades of dynamic range and better than 2% relative accuracy over the 3µA to 3mA range. The maximum APD current is programmed with a single resistor and a fast current limiter with indicator protects the APD during overload conditions.
Aeroflex Ltd. announced that the industry-standard TM500 LTE-A Single UE Test Mobile has added support for 3GPP Release 10 (Rel-10) Transmission Mode 9 (TM9), which allows enhanced network capability and performance by flexible use of MIMO with minimum additional overhead.