Abstract: A voice recording/reproducing apparatus includesan A/D converting circuit for converting an input analog voice signal into a digital signal;a digital signal processing circuit for coding the converted digital signal in a predetermined format and decoding the coded voice data;a recording medium for storing the coded voice data;a buffer memory;a D/A converter for converting the decoded digital signal stored in the recording medium into an analog voice signal;an operation unit for setting a predetermined mode; anda control circuit for performing a predetermined process for reducing noise in a reproducing operation to the voice data obtained from time a predetermined period of time before the operation unit recognizes that a recording stop operation is performed by the operation unit during a recording operation to time when the operation unit recognizes that the recording stop operation is performed whereby the noise due to a stop operation is reduced when the voice data is in said buffer memory and then transfe

Abstract: A process for preparing a compound of the formula (I) ##STR1## in which, R.sup.1 and R.sup.2 are the same or different and each is hydrogen or C.sub.1 -C.sub.6 alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a heterocyclic ring which is unsubstituted or substituted and is a 5-membered or 6-membered N-heterocycle which optionally has a further heteroatom which is oxygen, nitrogen or sulfur; E is methylene; ring A is a unsubstituted or unsubstituted aryl ring, or a substituted or an unsubstituted heteroaryl ring; R.sup.3 is a C.sub.1 -C.sub.6 alkyl and R.sup.4 is hydrogen, or R.sup.3 and R.sup.4 together are a group of the formula --(CR.sup.a R.sup.b).sub.m --C(.dbd.Y)-- (IV), wherein each of R.sup.a and R.sup.b is hydrogen or C.sub.1 -C.sub.

Abstract: Optically active carboxamide derivatives having analgesic activity and being useful as an analgesic agent. The compounds have a general formula: ##STR1## (in the above formula, R.sup.1 represents a hydrogen or halogen atom;R.sup.2 represents a halogen atom;R.sup.3 represents a pyrrolidino or piperidino group;Y represents a methylene or carbonyl group; andn is an integer of 1 or 2) and pharmacologically acceptable salts thereof.

Abstract: A process for preparing a compound of the formula (I): ##STR1## in which, R.sup.1 and R.sup.2 each represents hydrogen or C.sub.1 -C.sub.6 alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a heterocycle; E represents methylene, sulfur, oxygen or imino group optionally substituted with C.sub.1 -C.sub.6 alkyl or aralkyl; ring A is aryl or heteroaryl ring, optionally substituted; R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkyl and R.sup.4 is hydrogen or R.sup.3 and R.sup.4 together represent a group of formula (IV):--(CR.sup.a R.sup.a).sub.m --C(.dbd.Y)-- (IV)(wherein R.sup.a and R.sup.a is C.sub.1 -C.sub.6 alkyl or hydrogen, up to a maximum of 3 alkyl groups, m is 1, 2, or 3, and Y is two hydrogens or oxygen); provided that when E represents a methylene group, then R.sup.3 is a C.sub.1 -C.sub.6 alkyl group or R.sup.3 and R.sup.

Abstract: A one-chip microcomputer system includes a one-chip microcomputer, a nonvolatile memory which can electrically rewritably store changing data of a program stored in a mask ROM of the one-chip microcomputer, an input unit (connection unit) for receiving data to be written in the nonvolatile memory from an external device, and an object to be controlled by the one-chip microcomputer. In one aspect, the nonvolatile memory has first and second correction data areas, and first and second memories for respectively designating these areas. Upon reception of an initialization signal from the external device connected to the input unit, only the second memory for designating the second correction data area is initialized. In another aspect, the mask ROM stores ROM version data, and the nonvolatile memory stores board version data.

Abstract: Analgesic compounds of the formula (I); ##STR1## in which, R.sup.1 and R.sup.2 each represents hydrogen or C.sub.1 -C.sub.6 alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a heterocycle; E represents oxygen or an imino group optionally substituted with C.sub.1 -C.sub.6 alkyl or aralkyl; ring A is an aryl or heteroaryl ring, optionally substituted; R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkyl and R.sup.4 is hydrogen or R.sup.3 and R.sup.4 together represent a group of formula (IV):--(CR.sup.a R.sup.a).sub.m --C(.dbd.Y)-- (IV)wherein R.sup.a and R.sup.a is C.sub.1 -C.sub.6 alkyl or hydrogen, up to a maximum of 3 alkyl groups, m is 1, 2, or 3, and Y is two hydrogens or oxygen; provided that when E represents a methylene group, then R.sup.3 is a C.sub.1 -C.sub.6 alkyl group or R.sup.3 and R.sup.4 together represent a group of the formula (IV).

Abstract: Analgesic compounds of the formula (I): ##STR1## in which, R.sup.1 R.sup.2 each represents hydrogen or C.sub.1 -C.sub.6 alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a 5-6-membered N-heterocyclic ring optionally having a further O, N, or S heteroatom; E represents methylene; ring A is an unsubstituted or substituted benzene or naphthalene; R.sup.3 and R.sup.4 together represent a group of formula (IV):--(CR.sup.a R.sup.a).sub.m --C(=Y)-- (IV)wherein R.sup.a and R.sup.a is C.sub.1 -C.sub.6 alkyl or hydrogen with up to a maximum of 3 alkyl groups, m is 1, 2, or 3, and Y is two hydrogens or oxygens.

Abstract: Analgesic compounds are of the general formula (I): ##STR1## in which, R.sup.1 and R.sup.2 each represents hydrogen or C.sub.1 -C.sub.6 alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a heterocycle; E represents methylene, sulfur, oxygen or imino group optionally substituted with C.sub.1 -C.sub.6 alkyl or aralkyl; ring A is aryl or heteroaryl ring, optionally substituted; R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkyl and R.sup.4 is hydrogen or R.sup.3 and R.sup.4 together represent a group of formula (IV):--(CR.sup.a R.sup.a).sub.m --C(.dbd.Y)-- (IV)(wherein R.sup.a and R.sup.a is C.sub.1 -C.sub.6 alkyl or hydrogen, up to a maximum of 3 alkyl groups, m is 1, 2, or 3, and Y is two hydrogens or oxygen); provided that when E represents a methylene group, then R.sup.3 is a C.sub.1 -C.sub.6 alkyl group or R.sup.3 and R.sup.4 together represent a group of the formula (IV).

Abstract: In a cue recording system for a tape recorder, an audio signal is recorded by a first recording section on a first track of a tape. In a second recording section, a cue signal is superposed on the audio signal. The composite signal formed of the audio and cue signals is then recorded on the second track of the tape. In the playback mode, the audio signal and the cue signal recorded on the second track are separated by a filter. When the separated second-track audio signal is mixed with a first-track reproduced output, the resultant audio signal has substantially the same low-frequency response characteristic as a stereo head system, and a same S/N ratio as the monaural head system. An insufficient low-frequency response of the second track is compensated by the flat frequency response of the first track. Degradation of the S/N ratio of the signal of the first track can be improved by the mid or higher frequency component of the audio signal of the second track.

Abstract: A tape recorder motor circuit includes an automatic shutoff circuit and a motor servo circuit formed by a constant current circuit section, a bridge circuit, and an amplifier section. The constant current circuit section is connected to a power source through a switching transistor which is controlled by the automatic shutoff circuit. The amplifier section of the motor servo circuit is connected in a substantially direct manner to the power source, not through the switching transistor.

Abstract: Tape recorder apparatus includes an amplifier section and a tape deck section which is selectively attachable to and detachable from the amplifier section. The amplifier section includes a muting circuit which is connected to an amplifier bias circuit and is adapted to be connected to a switch circuit in the tape deck section when the tape deck section is connected to the amplifier section. When the two sections are connected, the switch circuit supplies a muting release instruction to the muting circuit in the amplifier section for normal amplifying operation and, when the two sections are disconnected from one another, the muting release instruction from the switch circuit in the tape deck section is withheld from the muting circuit in the amplifier section, thus disabling the amplifying function of the amplifier section by causing a change in the bias potential supplied by the amplifier bias circuit.

Abstract: A tape recorder wherein a control transistor is connected between a power source and a load circuit involving, for example, a motor circuit, mechanism control circuit and amplifier; and automatic shut-off circuit is connected in parallel to the load circuit. The automatic shut-off circuit is arranged to render the control transistor conductive at the time of power supply; and nonconductive when a terminal end of the tape is detected. A single-pole double-throw switch is provided which is only required to have a small current capacity, and has a movable contact connected to a power source, a first stationary contact connected to the voltage-detecting terminal of the automatic shut-off circuit and a second stationary contact connected to the base of the control transistor.

Abstract: A tape recorder capable of sounding an alarm which indicates the end of run of a tape, includes a tape recorder control circuit which sends a first signal for effecting tape end muting and for sounding an end alarm. The first signal is supplied to a speaker through a power amplifier. The alarm issued from the speaker is sensed by a microphone and later acoustically fed back to the power amplifier through a microphone amplifier. The microphone amplifier has its gain substantially reduced to zero upon generation of the first signal. Even though an audible alarm is sounded, howling which may otherwise arise from the acoustic feedback of the alarm sound, is suppressed.

Abstract: An automatic signal level control device has a variable impedance element whose impedance varies with the level of a control signal; a variable gain circuit whose gain varies with the impedance of the variable impedance element; and a detector for generating the control signal upon receipt of an output signal from the variable gain circuit. The detector includes a transistor whose base is supplied with a first signal corresponding to the output signal from the variable gain circuit and from whose emitter there is drawn out a second signal having a potential corresponding to that of the first signal; a feedback element which is connected between the base and emitter of the transistor; and a capacitor which is connected between the emitter of the transistor and a circuit having substantially no AC potential to store a charge corresponding to the second signal.

Abstract: A transient noise free type amplifier circuit includes a first amplifier having a noninverting input to which an input signal is applied, and a first output. An inverter inverts the input signal and supplies the inverted signal to a second amplifier having a signal input to which the inverted signal is applied, and a second output, and which second amplifier provides the same amplification as the first amplifier. A bias circuit supplies a predetermined bias potential to bias inputs of the first and second amplifiers, and a resistor circuit supplies the bias potential to the signal input of each of the inverter and the first amplifier. An output siganl which corresponds to the potential difference between the first output of the first amplifier and the second output of the second amplifier, is thus provided.

Abstract: A muting circuit having a first resistor (R10) one end (a) of which is supplied with an input signal, a second resistor (R12) serially connected to the first resistor, a first transistor (14) whose collector is connected to the junction point (b) of the first and second resistors, and a second transistor (16) whose collector is connected to the other end (c) of the second resistor. The emitters of the first and second transistors are grounded, and the bases thereof are supplied with a DC muting signal. An output signal derived from the other end of the second resistor is attenuated when the muting signal is supplied to the first and second transistors.

Abstract: A cue signal recording apparatus includes a recording head, a bias circuit for feeding a bias current to the recording head, a cue signal generating circuit for applying a cue signal to the recording head, and means for weakening a recording bias magnetic field caused by the bias current when the cue signal is recorded by the recording head on a tape with something already recorded in a superposing manner.

Abstract: A cue signal generating circuit for a tape recorder in which an audio signal and a cue signal of a lower frequency than that of the audio signal are simultaneously wherein only the cue signal is reproduced in the high speed travel of a tape to detect a recording position of the audio signal, comprises a pulse generator, a flip-flop which is normally reset and is set in response to the close of an operating means, a NAND gate which allows the output pulse signal from the pulse generator to pass therethrough in response to the set output signal from the flip-flop, a counter which counts the output signal from the NAND gate and when the count thereof reaches a prescribed value, applies an output signal to the reset terminal of the flip-flop, and a wave-shaping circuit for wave-shaping the output signal from the NAND gate and applies the wave-shaped signal to a recording head of the tape recorder.

Abstract: A control apparatus for controlling a microcassette tape transport of one motor type includes a first designation means (106) for designating a constant speed transport mode, a rewind mode, and a fast forward mode; a second designation means (124) for designation a direction of the motor rotation; a third designating means (122) for designating a direction of the tape transport. In order to effect the control of a tape transport on the basis of the combination of designations by the first, second and third designation means, the apparatus further includes a first memory means (301) which operates, e.g.