Abstract: A luminometer for assaying bioluminescence and chemiluminescence reactions characterized by sample wells having transparent bottom walls, a light detector positioned beneath the sample wells and a reagent injector above the wells.

Abstract: An implantable cardiac pacer having pacer circuitry for producing output stimulation pulses on leads connectable to a patient's heart includes internal measurement circuitry for producing uncorrected measurement values relative to battery conditions and to pulses from the pacing circuitry. The pacer has a data processing unit with a microprocessor and a RAM device for storing, in dedicated locations, programmed gain and offset correction factors for the uncorrected measurement values. Telemetry means is responsive to the microprocessor for transmitting the uncorrected measurement values and the correction factors to an external programmer/receiver unit. The programmer/receiver unit includes telemetry means for receiving the uncorrected measurement values and the correction factors from the pacer.

Abstract: A switched capacitor amplifier includes an operational amplifier with an inverting input terminal, a non-inverting input terminal, a bias current input terminal, and an output terminal. Current generating means responsive to a pulse train is utilized to provide the high bias current only at the beginning of each pulse cycle to the bias current input terminal of the operational amplifier.