PL89581B1 - Remote-control magnetic sound recording and reproduction installation[gb1468363a] - Google Patents

Abstract

1468363 Remotely-controlled magnetic record/playback apparatus ELEKTROAKUSZTIKAI GYAR 26 March 1974 [26 March 1973] 52211/73 Heading G5R A plural track magnetic sound recording and playback apparatus, such as the two-channel apparatus shown in Fig. 1 in which respective track channel parts are denoted by suffixed references c or C and d or D, has an operating mode selecting circuit 2 controlled by input logic signals, a store 3, 4 for each track to store output signals of circuit 2, a sequencing circuit 5 connected to the outputs of circuits 2, 3, 4 and providing logical control signals for controlling the recording and erase function and the playback function for each track, a recording amplifier 6 having for each track a first and a second analogue signal series circuit each consisting of an amplifier, (11) or (12), Fig. 2 (not shown), and an enabling electronic switch, (9) or (10), controlled by circuit 5, with the first series circuit connected between a recording signal input C 1 or D 1 and a recording head cf or df and the second series circuit connected between a bias oscillator 7 and an erase head c t or d t , and a playback amplifier 8 having for each track a third series circuit consisting of an amplifier (17), Fig. 3 (not shown), and an enabling electronic switch (16) controlled by circuit 5, the third series circuit being connected to a playback head c 1 or d 1 . Circuit 2 is controlled to select recording, playback, track one or two, rewind, fast forward wind and stop by inputs a 1 to f 1 from a local control unit l 1 and inputs a 2 to f 2 from a remote control unit l 2 , an input T of circuit 2 changing over between units l 1 and l 2 . The recording state for each track is indicated by respective lights, and the circuitry operates so that a recording state for the selected track can be brought about only by operating two switches in unit l 1 or l 2 in the correct order, circuit 5 monitoring the outputs of stores 3, 4, which store record command outputs of circuit 2 for respective tracks, to ensure that a recording command passes to recording amplifier 6 only when no reproducing command referring to the relevant track conflicts with this. [GB1468363A]

Claims (3)

Claims 1. A circuit for the remote control of the amplifiers of a two-band or multi-band tape recording and / or reproducing apparatus which comprises a gate circuit arrangement having logic inputs and connected to the outputs of that storage arrangement associated with the tapes, and further comprising a secondary circuit connected to the outputs of the logic circuit gate circuits and to the memories related to the tapes, where the secondary circuit arranges a pair of lines, i.e., a record-clear line and a playback line for each tape, with each of the two lines of the record control circuit being again connected to a circuit of reproducing amplifiers and further comprising an oscillator , characterized in that the secondary circuit (5) is made as the logic circuit of the output signal, and the circuit of the recording amplifiers (6) of each tape includes two series circuits consisting of one amplifier and one analog logical connector each, where the Control logical inputs signals of this obwoo du are connected to the write-control outputs of the signals (cr, dr), the secondary circuit (5), while the conduction circuit of the logic signals of the analog link and the amplifier connected in series is connected by the input (£ 1) to the output of the recorded signal and the output from the recording head (13), and the signal conduction circuit of the second logical analog coupler with the amplifier is connected to the erase head (14), and the input (U) is connected to the outputs (G ^ of the oscillator (7), the coupling (15) is connected between the serial circuit of the write head and the erase head, while the logic output (c_, d) of the secondary circuit (5) is connected to the control input (V2) of the serial circuit consisting of a logical jumper an analog and an amplifier located in the reproduction amplifier circuit (8), while the input of this circuit is connected to the reproduction head. 2. System according to claim The method of claim 1, characterized in that the logical analog coupler comprises a coupling member (R) inserted between the input points! and the output (H or J) to which the collector-emitter circuit of the transistor (Tr) is connected, while the other end of this circuit is grounded and the base of the transistor forms the control input (V). 3. The system, according to claim The method of claim 1, characterized in that the logical analog coupler comprises a transistor (Tr) whose collector-emitter circuit is inserted between the input and output (H or J) points of the coupler, while the base forms the control input (V) of the coupler. 89 581 '- LEI U7 ICjL Ul LU *: t ° gi ^ & »-j Mj 02 u 0 Zz Ce¬ dr Fig. 1 cnSSaJ Cr 6 cJfiTJST ctl ftt 5 C— o cw * / fy * MO fifc4«? ¦ * w ^ Fig .5 PL