Request InfoFemto Messtechnik GmbHFemto Messtechnik GmbH has introduced an ultralow-noise variable gain current transimpedance amplifier for sensitive current and charge measurements. The DDPCA-300 has a switchable gain from 104 to 1013 V/A and a dynamic range of 240 dB. Peak-to-peak noise is 0.4 fA, enabling measurement of currents in the femto to pico ampere range. Features include adjustable voltage directly on the amplifier input for device-under-test biasing, a DC optimized design with high stability and low drift, manual control and a remote interface. 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