Tone Control Circuit
Panasonic Corporation
Integrated Circuit Telephone Tone Ringer
NTE Electronics
Stereo-tone/volume control circuit
Philips Electronics
Stereo-tone/volume control circuit
Philips Electronics
DC VOLUME, TONE CONTROL CIRCUIT
Samsung
NTE832 & NTE832SM Integrated Circuit Tone Decoder
NTE Electronics
Three Siren Sound Generator
Unspecified
Three Siren Sound Generator
UMC Corporation
Traffic control messages and warning tone circuit
Unspecified
PCM CONFERENCE CALL AND TONE GENERATION CIRCUIT
STMicroelectronics
