Abstract:
Internal clock generating circuitry comprises a phase comparator (1) for comparing the phase of a clock signal applied thereto from outside the circuitry with that of a feedback signal fed back thereto, and for generating a voltage corresponding to the difference between the phases of those clock signals, a voltage-controlled oscillator or VCO (2) for generating a clock signal having a frequency corresponding to the voltage from the phase comparator (1), a normal clock signal generating circuit (3) for generating at least one normal clock signal used for making an internal circuit operate under normal conditions from the clock signal from the VCO (2), and for generating and feeding the feedback signal back to the phase comparator (1), a test VCO (5) for generating a clock signal having a frequency corresponding to the voltage from the phase comparator (1), a test clock signal generating circuit (6) for generating at least one test clock signal used for testing the internal circuit from the clock signal from the test VCO (5), a selector (4) for selecting either the normal clock signal or the test clock signal generated, and for furnishing the selected clock signal to the internal circuit, and a control signal generating circuit (7) for generating a control signal to stop the test VCO (5) according to an input signal applied thereto from outside the circuitry.
Abstract:
A timer control circuit includes timers that perform count operations. A signal selection circuit selectively passes underflow signals supplied from the timers, based on control signals. A flip-flop is supplied with an output of the signal selection circuit section as a toggle signal.
Abstract:
This RBDS receiver comprises a database having broadcasting station related information. The receiver is provided with a read-only database memory in which broadcasting station related data have been stored respectively in association with geographical positional information, the broadcasting station related data including broadcasting station identification data, program type identification data and receptiond frequency data; a demodulator system for demodulating the RBDS data from received broadcast waves; a randomly accessible database supplementary memory; and a control system for comparing the RBDS data with the broadcasting station related data and the data stored in the supplementary memory to perform write control for writing the RBDS data into the supplementary memory if a broadcasting station indicated by the RBDS data is not coincident with any of broadcasting stations indicated by the broadcasting station related data and the data stored in the supplementary memory. According to the present invention, the database can be supplemented immediately and accurately in response to updates and revisions of the contents of actually broadcast programs. Also, the control for display and so on can be appropriately performed in accordance with the contents of actually broadcast programs.
Abstract:
Multiplex broadcast receiving method and receiver which can easily update the preset contents of classification information, such as a program type, in an RDS broadcasting. The RDS receiver is constituted by a memory control section for storing the classification information (PTY code) demodulated from RDS broadcast waves which are being received into a PTY memory; the PTY memory for storing the classification information; and a station selecting section for selecting a station of the multiplex broadcast waves regarding the classification information by reading out the classification information from the PTY memory. This enables the use of the classification information of the broadcasting station being received as it is, so that the user can store the favorite program type by a simple operation.
Abstract:
A communication system for e.g. an automobile including a system control unit for activating a selected audio/video device (such as an AM/FM tuner or a navigation system) in response to a request signal transmitted on a bus from a command input terminal. The system control unit generates command signals necessary to activate the selected audio/video device in response to the request signal, including command signals to de-activate any currently-operating devices. Conversely, adjustment commands (such as volume change or channel change commands) are transmitted directly (that is, unchanged by the system control unit) from the command input terminal to the selected audio/video device on the first bus line. In addition, the audio/video devices transmit reset signals whenever power is shut-off and then restored. Each reset signal includes a transmission source address corresponding to the audio/video device which transmitted the signal. The system control unit compares these transmission source addresses with a stored address corresponding to the selected audio/video device, and transmits a command signal to restart the selected audio/video device. Further, when the system control unit is turned off and then restored, the system control unit transmits a reset command to all of the audio/video devices connected to the bus.
Abstract:
Tuner for receiving a plurality of receiving frequencies and audio system having a plurality of audio components, characterized by the provision of a device for generating a designation command for selectively designating a program source such as a broadcast station at the receiving frequency of the tuner or an audio component, and an equalizer for adjusting the audio signal from the selected program source to have a frequency characteristic according to the program source designated by the designation command. By this provision, the need of operating tone controls at each time of the change of program source is obviated, so that the readiness of operation is improved.
Abstract:
An image forming apparatus having a main body with an opening portion provided in one face of the main body, and a thermal transfer printer. The thermal transfer printer records desired information additively on paper on which a toner image has been fixed. The printer uses a thermal head to press an ink-ribbon on the paper. The thermal transfer printer includes a casing in which a cassette for housing the ink-ribbon is detachably mounted, a thermal head support for supporting the thermal head, and an interlocking mechanism. The interlocking mechanism retracts the thermal head with the thermal head support in response to retraction of the casing. Thus, it is possible to detach the cassette from the main body through the opening portion. This facilitates replacement of cassettes and clearing of paper jams.
Abstract:
Frequency characteristic setting circuitry for an amplifier generates frequency band data groups using a plurality of characteristic pattern data groups stored in a memory. Each of the frequency band data groups is made by making each item of data of a characteristic pattern data group retrieved from among a plurality of characteristic pattern data groups stored in the memory correspond to each frequency in a designated frequency band. The data groups generated for a plurality of frequency bands are combined together and the equalizing characteristic of the amplifier is controlled according to a characteristic pattern data group obtained by the combination.
Abstract:
The electronic device includes a control unit 10 configured to set in stages a plurality of thresholds which relate to the data based on press and cause a predetermined processing to be executed. The control unit 10 sets the thresholds such that, as the data based on press increases, the difference between thresholds gradually decreases.
Abstract:
A tactile sensation providing apparatus includes a touch sensor 11, a tactile sensation providing unit 13 configured to vibrate a touch face of the touch sensor 11, a tactile sensation provision control unit 14 configured to control drive of the tactile sensation providing unit 13, and a main control unit 17 configured to control an operation of the tactile sensation provision control unit 14 based on an output of the touch sensor 11. The main control unit 17 determines whether an object is touching a predetermined area of the touch face based on the output of the touch sensor 11, and starts the operation of the tactile sensation provision control unit 14 when determining that the object is touching the predetermined area, or stops the operation of the tactile sensation provision control unit 14 when determining that the object is not touching the predetermined area.