Kabushiki Kaisha Suwa Seikosha

Masao Akahane

Koji Takeda

Chitoshi Takayama

Minoru Hosokawa

Kanemitsu Kubota

Fumiaki Mukaiyama

Yasuhiko Kudo

A FSK demodulation circuit using counter techniques to distinguish between two transmitted frequencies, provides a delay preceding the change points of the demodulated signal to reduce signal distortion. Presettable counters reduce the number of data bits for processing, and a plurality of counters count an equal plurality of zero-cross intervals to reduce distortion. Registers and multiplexer further reduce circuit complexity.

FSK Demodulation circuit

Storage space in this speech synthesizer is minimized by features including multiplex storage of voiceless phonemes and use of a word designator which selects in parallel information from a word memory and phoneme memory.

Speech synthesizer

A multifigured or matrix-type liquid crystal display is driven by an applied voltage selected so that the effective value of the voltage applied to a display segment identified visually may have the maximum ratio to the effective value of the voltage applied to a display segment not identified visually. The multi-figured display can be driven as an X-Y matrix by coupling together the corresponding segment electrodes of each figure and sequentially actuating the common electrode of each figure. In a matrix-type liquid crystal display, the respective row electrodes of each digit would be coupled together, and the column electrodes sequentially actuated, to likewise define an X-Y matrix. In such an X-Y matrix-type liquid crystal display having N electrodes sequentially actuated, the applied voltage may be predetermined so that the voltage applied across a region of the liquid crystal material between said electrodes to be rendered visually identifiable may be (.sqroot.N + 1) times as high as the voltage applied to a region of the liquid crystal material between said electrodes which is not rendered visually identifiable.

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Suwa, Japan

Masao Akahane