Abstract: An electronic time keeping device has a stepping motor including a rotor, a stator and coils mounted in unitary fashion. Hands of the minimum unit of time are mounted directly to the shaft of the stepping motor. Gear mechanisms, electronic parts and the like are accommodated in a depressed portion on the upper surface of the time keeping device.

Abstract: A voice data output apparatus judges whether amount of money data inputted is repeat registration data or not and, when it is repeat registration data, does not output a voice of the amount data. A CPU is connected to an input circuit, a print circuit, a display circuit, a RAM and the voice output circuit, through chip designating signal lines, an R/W signal line, an address bus line and a data bus line. The CPU delivers chip designating signals to the respective circuits to select the circuit to be used. The display circuit and the voice output circuit are selected by the same chip designating signal. When the repeat registration data is inputted with the input circuit, given code is stored in a digit representing the repeat registration in a register X of the CPU. When the data in the register X is transferred to the voice output circuit, the output circuit judges the code and does not produce the voice of the amount data.

Abstract: A date data input/output control system for electronic device allows date data, such as "year", "month" and "day" to be inputted in any order into a CPU from an input device. A mode may be specified corresponding to the inputting order of the date data in a CPU. The date data inputted are rearranged in the CPU into a given time counting order in accordance with the mode specified, and stored in a memory in the given time counting order. In displaying or printing in an output device the date data thus stored, the date data are rearranged in the CPU into an order corresponding to the specified mode.

Abstract: Light-emitting diodes (LEDs) are provided for operation keys such as a tone select switch or performance keys of an electronic musical instrument. The display drive lines for the LEDs are arranged in the form of a matrix, and a dynamic drive signal is supplied to them. With these LEDs, the operation state of the operation keys is indicated. The LEDs are adapted to indicate the performance key to be operated next to the player.

Abstract: Bar codes representing sound information are printed on a marginal portion of a score. Prior to the performance, these bar codes are read out by a bar code reader, whereby chord data represented by these bar codes are successively stored in a memory provided in the body of a musical instrument. At the time of the performance, accompaniment sound corresponding to the stored chord data is automatically added to the melody performed by the player.

Abstract: In an electronic timepiece, which has a time display section constructed such that optical display elements are selectively driven for time display, the display mode of the time display section can be controlled to provide dynamic displays other than an ordinary time display mode, and in addition to an ordinary time display mode.

Abstract: Coefficients used for calculating a transfer function are read out from a ROM corresponding to the cutoff frequency of a desired filter. Using the coefficients read out from the ROM, other coefficients are calculated in a coefficient calculating circuit. The filtering operation is performed by a digital filter circuit, using the obtained coefficients together with the coefficients read out from the ROM.

Abstract: A power saving device for an electronic musical instrument in which when the electronic musical instrument is idle, or no key operation by an operator takes place for a given period of time, a power source is automatically turned off to thereby prevent wasteful power consumption.

Abstract: An electronic musical instrument comprises a plurality of musical tone control units each having a tone waveform producing circuit, a volume envelope circuit, a filter circuit and other circuits. A given musical tone data can be preset in each musical tone control unit. Musical tone signals produced by the musical tone control units are synthesized to provide an effective musical tone.

Abstract: In a data registering system, keyed-in data coupled from a key input section and voiced sound input data coupled from a microphone are compared in a sound controller and, when both the keyed in and voiced data coincide, subsequent calculation processing with the input data is allowed.

Abstract: First to third switch contact pairs are provided for each of the performance keys of an electronic keyboard musical instrument such that they are successively closed in an interlocked relation to the operation of the associated key. A first time interval from the closure of the first switch contact pair till the closure of the second switch contact pair and a second time interval from the closure of the second switch contact pair till the closure of the third switch contact pair are counted in a CPU, and their ratio is obtained therein. The tone color of the output musical signal is controlled according to the value of this ratio, and the volume of the musical signal is controlled according to the length of the second time interval.

Abstract: A tone signal having been data compressed or expanded is obtained through a circuit for taking the sum of upper three bits of envelope data, a latch for storing the output of said circuit, a circuit for setting the extent of bit shift of digital tone data according to the output of said latch, a latch group for latching the tone data having been bit shifted according to the output of the setting circuit, and an amplifier, the amplification level of which is set according to the extent of bit shift and which receives and amplifies the bit shifted tone data from a digital-to-analog converter.

Abstract: A compact electronic device having a calendar function wherein initial data for setting a plurality of specified dates and setting data for setting a plurality of specified dates based on the initial data are input by a key input section. Then, dates to be set as specified dates are calculated by a RAM, a control section and an operation circuit according to the input initial and setting data. The calculated dates are stored in a memory so that the plurality of specified dates may be set.

Abstract: A series of musical tone codes for musical performances and synchro start codes are stored in a main memory. A series of musical tone codes for one-key play or an automatic play are stored in a submemory. In the course of playing music on the basis of said musical tone codes read out from the main memory, when the synchro start code is read out, an automatic play on the basis of musical tone codes stored in the submemory is performed accompanied by the musical tone codes stored in the submemory under control of a CPU, if necessary.

Abstract: An electronic cash register, which is so constructed as to print particular dates such as those of "off" days (i.e., business holidays) and bargain days of the store on the receipt to be issued. The particular dates to be printed on the receipt are previously memorized in a memory, and at the time of the issuance of the receipt, specific dates to be printed on the receipt are determined from the memorized particular dates and the current date.

Abstract: An exponential operation device comprises an exponential operation circuit for carrying out the exponential operation of a term x.sup.y formed of data x and data y; and an operation circuit for judging whether the data x supplied by key depression denotes a positive or negative value, and also whether or not the data y supplied similarly by key depression is an integer. Where the operation circuit judges that the data x denotes a negative value and the data y is an integer, then the exponential operation circuit carries out the exponential operation of the term x.sup.y, thereby providing an answer even when the data x denotes a negative value.

Abstract: A compact portable printing electronic calculator comprises a holding section for receiving a recording paper tape which is multiple-folded in a large number of sheet forms and a printer set ahead of the recording paper tape outlet port of the holding section. The printer impresses data on the respective sheet forms, each time they are drawn out of the holding section.

Abstract: In a printing control device for a thermal printer, a character read out from a character buffer for storing characters to be printed is supplied to a decoder and is then output from a character generator as a dot signal. In response to the dot signal from the character generator, an on-time preparing circuit outputs an on-time signal having a time duration determined by the number of dots associated with the dot signal or by the number of characters determined by the number of dot patterns. A voltage is applied to printing elements of a printing head for performing a printing operation for a time period determined by the duration of the on-time signal from the on-time signal preparing circuit.

Abstract: A round-off type of numeric data display apparatus which has at least X, Y, Z and K registers, and which stores in said X register a previous data item obtained by a previous one of arithmetic operations convergently producing a result in turn, stores in said Y register an immediately succeeding data item obtained by an immediately succeeding one to said previous one of said arithmetic operations, stores in said K register that number of digit-place data items to be rounded-off of said immediately succeeding data item which has been obtained by the arithmetic operation in an arithmetic-operational section connected to said X, Y, Z and K registers, subjects said immediately succeeding data item to rounding-off operation in said arithmetic-operational section on the basis of the contents item of said K register and stores the result of said rounding-off operation in said Z register, transfers the contents item of said Z register and a decimal point code of said Y register to a display buffer connected to said Y

Abstract: An electronic timepiece with alarm function includes a voice code memory for storing voice codes corresponding to externally coupled voices in accordance with write instruction signals corresponding to respective alarm times. The voice code memory includes a plurality of memory regions, and new voice codes are stored in a memory region immediately adjacent to the memory region in which voice codes are already stored. The voice codes read out from the voice code memory at the arrival of a predetermined alarm time are decoded for coupling to a sound producing unit to produce sound corresponding to the read out voice codes.