JPS6285908U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional recording equalizer characteristic switching device. Explanation of main figure numbers, 20... Recording amplifier, 46... Tape selector circuit, 48, 49, 50... AND circuit, 51... First transistor group, 55... Second transistor group, 59... First peaking circuit group, 60
...Second peaking circuit group.

Claims (1)

[Scope of utility model registration request] Equipped with two decks in a single cabinet,
In a tape recorder that can record the playback signal of one deck on the other deck at two types of tape running speeds, it is used when a recording amplifier and a first tape running speed are selected, and are connected to the return path of the recording amplifier. a first peaking circuit group consisting of a number of peaking circuits corresponding to the number of types of magnetic tape that can be selected and a second peaking circuit group that is used when the tape running speed is selected, and is connected to the feedback path of the recording amplifier and can be selected. A tape having a second peaking circuit group consisting of peaking circuits as many as the types of magnetic tapes, and output terminals as many as the types of magnetic tapes that can be selected, and having different output terminals for generating control signals depending on the types of magnetic tapes. a first transistor comprising a selector circuit and a plurality of transistors each having a base connected to each output terminal of the tape selector circuit and having a collector-emitter path connected between each of the first peaking circuits and ground; a gate circuit group consisting of a transistor group and a plurality of gate circuits each generating an output in response to a control signal generated from each output terminal of the tape selector circuit when a second tape running speed is selected; a second transistor comprising a plurality of transistors each having a base connected to the output end of each gate circuit of the circuit group and having a collector-emitter path connected between each of the second peaking circuit group and ground;
and a peaking circuit of each of the first and second peaking circuit groups used when using the same type of magnetic tape, and a transistor of each of the first and second transistor groups that are respectively grounded. The base of each transistor in the first transistor group is connected to the connection point of each transistor in the second transistor group and the peaking circuit in the second peaking circuit group, and A recording equalizer characteristic switching device characterized in that a desired recording equalizer characteristic can be obtained depending on the tape running speed.