Abstract: In a recording/reproduction apparatus, when a rotational-speed-mode setting instruction is received from an I/F unit, a CPU reads out a control procedure from a storage device, controlling other components in accordance with the procedure. As a result, a node switch driving circuit controls field windings of a pulse motor to a switching sequence, driving the pulse motor to rotation at a predetermined rotational speed. Since the control is feedback control, the pulse motor rotates at the predetermined rotational speed specified by an instruction setting a rotational-speed mode with a high degree of reliability. Data can thus be recorded into and reproduced from a magnetic disk at a variable speed.

Abstract: In a recording/reproduction apparatus, when a rotational-speed-mode setting instruction is received from an I/F unit, a CPU reads out a control procedure from a storage device, controlling other components in accordance with the procedure. As a result, a node switch driving circuit controls field windings of a pulse motor to a switching sequence, driving the pulse motor to rotation at a predetermined rotational speed. Since the control is feedback control, the pulse motor rotates at the predetermined rotational speed specified by an instruction setting a rotational-speed mode with a high degree of reliability. Data can thus be recorded into and reproduced from a magnetic disk at a variable speed.

Abstract: A video signal recording apparatus, typically a high-band 8-mm, (Hi 8) video tape recorder, records a video signal through frequency modulation on a magnetic tape. The video signal recording apparatus has a preemphasizing circuit for preemphasizing a video signal, a clipping circuit for clipping the preemphasized video signal at a clipping level, and a frequency modulator for frequency-modulating the clipped video signal. The clipping circuit comprises a white clipping circuit for applying a plurality of selectable clipping voltages corresponding to different white clipping levels, respectively, and a dark clipping circuit for applying a plurality of selectable clipping voltages corresponding to different dark clipping levels, respectively. The clipping levels are selected depending on the type of the magnetic tape, e.g., whether it is an evaporated tape or a metal tape.