Matsushita Electric Industrial Co., Ltd.

Takehide Takemura

Shunji Minami

Shunzo Oka

Hiroshi Yamada

An electric micrometer with a U-shaped frame has

Electric micrometer

A pulse detection circuit, is used for detecting pulses contained in output signals derived from an encoder. An encoder, such as rotary encoder, converts a physical quantity like spatial position, displacement or length into an electric signal. This detection circuit achieves high definition in terms of the rotational angle of the encoder shaft. It does so by positively utilizing four different combinations of modes, obtained for one period of the encoder output signals, which had hitherto been treated in one count. It thereby avoids erroneous counting of the pulses contained in the encoder output signals, even if chatterings are incidentally included in the encoder output signals and if the phase relation between the two signals is temporarily inverted. The circuit thus performs pulse detection with a very high accuracy.

Encoder output pulse detection using two stage shift register and clock

A pulse detection circuit, for detecting pulses contained in output signals derived from an encoder such as rotary encoder which converts any physical quantity like spatial position, displacement or length into an electric signal, is disclosed. The disclosed pulse detection circuit can minimize the positional error in counting pulses and effectively prevent the accumulation of the erroneous count value by an ingeneous establishment and control of the logical relationship among signals by the use of a gate circuit including a plurality of AND gates and an RS flip-flop. It therefore will not erroneously count pulses contained in the encoder output signals even if noise or pulse chatter are incidentally included in the encoder output signals and if the phase relation between the two signals is temporarily inverted, to perform a pulse detection in a very high accuracy.

Pulse detection circuit

In a device of the type in which the output voltage derived from the source of a MOS field-effect transistor is varied in response to the voltage across a non-polarized capacitor connected to the gate of the field-effect transistor, positive and negative inputs are provided by two switching elements which are controlled in response to small DC signals. The device functions as a variable resistor, and is adapted to be remotely controlled.

Device for generating variable output voltage

Electronic switches are used for switching the fine-tuning variable resistors in the electronic tuners of television receivers or stereophonic systems, and consist of a number of thyristors with P- and N-gates connected in parallel. The cathodes of the thyristors are connected in commmon, while a switch is connected to the anode circuits of said thyristors. A detector having an input connected to the N-gate circuits of the thyristors and an output connected to said switching means; and a number of input terminals each connected to the P-gate of each thyristor are also provided.

Electronic multi-channel selection switch with common new-selection

A remote control system including a variable resistor with switching means the variable resistor unit comprises a variable resistor and a switching means, said switching means being interlocked to said variable resistor such that said switching means is operated only when it is desired to adjust the variable resistor. With this variable resistor with switching means the operation of the switching means and adjustment of the variable resistor for volume control or the like can be effected through a single operation.

Remote control signal transmitter including variable resistor with

An electronic power varying controller device adapted for a dimmer, etc. and having substantially no mechanically sliding portions, comprising a thyristor connected with a load such as a lamp, a firing phase controller circuit for the thyristor, a field effect transistor for controlling the firing phase controller circuit, a capacitor connected in parallel with the gate circuit of the field effect transistor, a highly insulating switch connected in series to the gate of the field effect transistor, and a switch to be connected with the highly insulating switch for selecting a positive or negative potential.

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Hirakata, Japan

Takehide Takemura