An analog optical link in surface mount technology (SMT) for multichannel biomedical data acquisition

A stand-alone, low-cost analog optical link for biomedical data is described. This compact device features low power consumption and low noise and serves as a safe link between biodata amplifiers and computerized recording equipment. A modular surface mount technology design assures the high reliability and high package density required in multichannel applications in EEG and event-related potential research. With only a few modifications, the data link can transmit dc signals with low drift, or interface fast signals such as brainstem evoked potentials. The maximum bandwidth ranges from dc to 5000 Hz.