PBM3910 – ERICSSON

The Ericsson PBM3910 is a monolithic digital speech controller fabricated using a CMOS process. It incorporates a dedicated architecture optimized for speech processing functions, including encoding, decoding, and speech recognition algorithms. The device features integrated analog-to-digital and digital-to-analog converters (ADCs/DACs) for direct interface with microphone and speaker transducers. Internal memory, typically ROM or Flash, stores speech templates and control parameters. The PBM3910 operates from a single voltage supply, typically in the range of 3.0 to 5.5V, and consumes minimal power in standby mode. Communication with a host processor is facilitated through a serial interface, such as SPI or UART, enabling external control and data transfer. Specific speech coding standards supported (e.g., ADPCM, LPC) and memory capacity vary depending on the specific PBM3910 variant.