Pioneer Electronic Corporation

Sekisui Kagaku Kogyo Kabushiki Kaisha & Ichinose Co., Ltd.

Tadashi Ogawa

Reisuke Sato

Yoshiharu Ueki

Hisashi Suganuma

Tadashi Kosuga

Tomohisa Yokogawa

Masanao Okatani

Haruo Kama

Yoshiaki Ishibashi

Hiroshi Onishi

Hitoshi Ishiyama

Kunio Iwamoto

Hideki Wakahara

Ball plug valve

An electronic tuning type receiver comprises a digital-to-analog conversion section having a memory adapted to store a digital input value obtained by counting pulses generated by a manual operation. In one embodiment an up-down counter is also employed. A digital-to-analog conversion process section generates a pulse signal having a number of pulses per unit time corresponding to an output of the memory or counter and a tuning section receives as a tuning signal, an analog output signal of the digital-to-analog conversion section. The receiver further comprises an electric source 'off' state detecting circuit which, in one embodiment only when both of the outputs of the digital-to-analog conversion process section and an electric source thereof are brought to be in 'off' state, operates to suspend the operations of relevant sections of the receiver. In another embodiment the up-down counter and pulse oscillator are suspended when the power is switched off.

Electronic tuning type receiver with digital to analog converter

A manual tuning pulse generator for use in an electronic tuning control device of a radio receiver having a tuning circuit, which control device utilizes an up/down counter, is disclosed which comprises a first manual means for selectively producing an up count signal and a down count signal to be supplied to the up/down counter, a second manual means ganged with said first manual means for producing a variable control signal and means responsive to the variable control signal to produce a clock pulse signal having a variable frequency, the pulses of the clock pulse signal being adapted to be counted up or down by the up/down counter the content of which is utilized to shift the tuning frequency.

Manual tuning pulse generator

The present invention is a magnetic tape running state and tape run amount display device which displays visually the running direction and speed or the run amount and direction of the magnetic tape. An up-down counter is provided with a clock input signal having a pulse generated in correspondence with the run of the tape and is also provided with a count control signal. The count control signal has an UP signal generated when the tape is being transported in a first or forward direction, and has a DOWN signal generated when the tape is being transported in a second or reverse direction. The up-down counter provides a binary output count signal to a display circuit in correspondence with the clock input signal and the count control signal. The up-down counter can also be provided with a reset input responsive to a reset signal which acts to reset the count back to logic 0. The display circuit provides a visual representation of the binary output signal, and may include a first binary-to-digital decoder and a second binary-to-digital decoder, each being responsive to a preselected portion of the binary bits provided by the up-down counter. A plurality of light emitting diodes are connected between decimal output lines of the first and second binary-to-digital decoders for providing a visual indication of the tape running state and run amount. In one arrangement, the diodes are arranged to define a line. The display circuit also can be responsive to the binary tuning signal provided by an electronic tuning type receiver.

Magnetic tape running state and tape run amount display device

The present invention is an electronic tuning type receiver having a band display unit and a numerical frequency display unit. The numerical frequency display unit provides a visual numerical display of the frequency selected by the receiver. The band display unit provides a visual indication of the relationship of the selected frequency with respect to the frequency band being tuned by the receiver.

Electronic tuning type receiver having a band display and numerical

A combination device having a magnetic recording and reproducing unit and an electronic tuning type receiver, where the channel presetting switches of the electronic tuning type receiver also can act as the operating switches of the magnetic recording and reproducing unit. The electronic tuning type receiver is of the type which is tuned by control signals provided to a tuning means by a plurality of channel selecting switches. A selection circuit is interposed between the tuning means and the plurality of channel selecting switches and provides the plurality of control signals to the tuning means when a selection switch is in a first binary state, and provides the plurality of control signals to a tape-control section when the selection switch is in a second binary state. The tape-control section, in response to the plurality of control signals, controls the mode of operation of the magnetic recording and reproducing unit, and also provides a signal indicating the mode of operation to a sensing circuit. The sensing circuit, in turn, provides mode signals to a digital display unit which can visually display the mode of operation when the magnetic recording and reproducing unit is being used, as well as can visually display the station frequency or the like of the selected station when the electronic tuning type receiver is being used.

Combination device having a magnetic recording and reproducing unit and

An electronic preset type tuning control device of a tuner using a varactor diode means for multi-band radio receiver is disclosed, which comprises a manually operable tuning pulse generator capable of generating a clock signal and an up or down pulse signal which may be controlled manually, an up/down counter responsive to the output of the pulse generator to produce a binary signal corresponding thereto, a random access read/write memory for storing the binary signal at addresses assigned by a pair of ganged band selector switches a channel selector switch and a preset switch, a digital-analog converter responsive to the binary signal to convert it into a d.c. signal which is fed to the varactor means to tune the tuner to a desired frequency and a control means responsive to the outputs of the preset switch, the band selector switch and the channel selector switch for reading out the data stored in the memory to cause the counter to transmit it to the digital-analog converter without chattering noise due to the operations of the switches.

Control device of electronic preset type tuner for multi-band radio

During preset station selection operation in a digital receiver the station selection switch most recently operated is indicated by a light so as to prevent erroneous operation at the same switch again.

Station selection indicating device

A preset state indicating unit for use in an electronic tuning type receiver generates a visual indication when both a presetting switch and one of a plurality of channel selecting switches have been properly selected. The preset state indicating unit thus insures that tuning information pertaining to a selected station is actually stored in memory during the presetting operation done by the user.

Growing community of inventors

Tokorozawa, Japan

Tadashi Ogawa