BA3830S

Audio ICs Band-pass filter for spectral analyzers BA3830S The BA3830S is a 6)1 band band-pass filter for spectral analyzer displays with internal recording indicator output. All of the capacitors comprising the filter are internal capacitors, making it possible to significantly reduce the number of attached components. This enables configuration of compact sets with a high level of reliability. FApplications CD radio cassette players, mini-components, car stereos FFeatures 1) Six internal band-pass filters for spectral analyzers 2) Internal input / output for recording indicators FAbsolute maximum ratings (Ta = 25_C) 3) Internal capacitors reduce the number of attachments. FRecommended operating conditions (Ta = 25_C) 583 Audio ICs FBlock diagram BA3830S 584 Audio ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 5V, RL = 10MΩ, Rφ1 = 270kΩ, Rφ2 = 270kΩ) BA3830S 585 Audio ICs FMeasurement circuit BA3830S 586 Audio ICs FCircuit operation (1) LINE and REC input circuits The LINE and REC input circuits are configured as differential amplifiers, and the gain can be set to any desired value using an external resistor. The input impedance is determined by the external resistor. BA3830S (2) Bias circuit A bias voltage of VCC / 2 is applied to each of the circuits. Since the output stage uses a push-pull configuration, a stable bias source can be obtained. (3) BPF circuit This is a circuit that selects the required frequency component from the...