Abstract: A chronographic electronic timepiece adapted to display elapsed time wherein the time displayed is rounded off to the nearest half period is provided. Chronographic divider stages adapted to apply signals representative of elapsed time to associated display elements include a binary divider stage adapted to produce elapsed time signal having a period which is the longest time period not displayed by said display elements. A rounding off circuit is provided for advancing the period counted by the binary divider stage in order to advance the count thereof by half a period to effect a rounding off of the time displayed by the display elements.

Abstract: A timepiece having a quartz crystal vibrator serving as a time standard, a digital display, and integrated divider and C-MOS transistor driving circuits for dividing the high frequency signal from the vibrator into low frequency timing signals for the direct driving of the liquid crystal display. A battery energizes the vibrator and divider circuits but the voltage thereof is insufficient for energizing the display driving circuits. Said voltage is stepped up by a circuit including a rectifier circuit monolithically integrated on the same substrate as said complementary coupled transistor integrated driving circuit and produces a voltage sufficient to energize the driving circuit.

Abstract: A device for correcting running of an electronic watch comprises two contactors acting on respective bistable circuits in turn acting on a combinatory circuit controlling a counter which provides binary correction information to an inhibitor circuit. The latter is arranged to inhibit a number of pulses of a pulse generator having a predetermined nominal frequency above a given value, to set the frequency at said given value prior to division to provide accurate clock pulses fed to a device for indicating the time. Successive actuation of respective contactors corresponds to increasing or decreasing the number of inhibited pulses from an approximate number stored in a programmable memory.

Abstract: The present invention relates to a counter feed mechanism as used in digital clock comprising a cam member adapted for advanced rotation and another cam member adapted for delayed rotation both arranged on a common axis so that the advanced rotation of the first-mentioned cam member under a drive force transmitted from a clock mechanism twists a coil spring stretched between both cam members, which is, in turn, charged with energy for rotation of the second-mentioned cam member and, upon rotary displacement of the first-mentioned cam member by a predetermined angle, said second cam member is released to be rotated at once so as to advance a rotary wheel step by step.

Abstract: The system of this invention is for use with an electronic musical instrument having a keyboard, and generally includes keyboard circuitry, audio waveform generators, envelope generators, static and dynamic filter circuitry and power amplifier and speaker apparatus. In accordance with one feature of this invention, the system comprises means for establishing different digital voice codes which are coupled to read only memories associated with the audio waveform generators, envelope generators and main voice circuitry. This voice code provides a limited number of program conditions to control such variables as audio waveform pulse widths, envelope attack, decay, sustain or release intervals, and instrument resonator control. Another feature of the present invention is concerned with the keyboard circuitry which operates from a digital key and octave code. Each code is sequentially interrrogated to determine if the corresponding key has been played.