Microelectronics

When controlled by serial data, the Delphi Seven Band Equalizer (SBEQ) provides all of the functions of a high performance equalizer, including input selection, seven bands of equalization, loudness, volume, fade, balance, and soft mute on any of three stereo sources. The exploitation of transconductance-C circuit techniques minimizes the number of external components required. The SBEQ contains seven fully integrated bandpass filters with +/-12 dB boost and cut ranges. Four independently controlled output attenuators are used to control fade, balance, and volume levels. Individual left and right loudness filters and attenuators are also included to boost low frequencies at low volume levels. Each of these functions is independently controlled via serial data words.