Abstract: Vocalizing apparatus for use in a doll which has a synthesizer for producing speech sounds. The synthesizer is controlled by a digital controller having a memory which stores information representing a vocabulary of infant-like sounds. A motion detector, which may be in the form of a gravity-actuated switch, activates the controller so as to cause the synthesizer to produce a pattern of sound simulating happy infant sounds when the doll is moved and when it is cuddled, and fussing or crying sounds when it is thereafter not moved for a time. The electronic apparatus is shut down if the doll is left unmoved for a time after it no longer emits the fussing sounds but is automatically activated when again it is moved. The vocalizing apparatus is provided in a self-contained package, removable for laundering.

Abstract: A line powered electronic network which utilizes a bridge configuration for connecting a microphone and receiver to a telephone line which provides increased line voltage during operation of an associated tone generator. The network is so constructed that the d-c voltage across the line is increased during operation of the associated tone generator so as to prevent clipping of the tone signals. Each of the d-c feedback paths around the amplifier of the network includes a plurality of R-C networks connected in cascade so as to provide sufficient filtering at low audio frequencies while meeting the overall time constant required for changing the d-c operating conditions of the set.