RECORDING/REPRODUCING CIRCUIT
PROBLEM TO BE SOLVED: To provide an electronic still camera recording/reproducing circuit with simple circuit constitution and with excellent signal quality by simultaneously connecting a recording circuit and a reproducing circuit to a magnetic head and supplying a power source to a recording curre...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide an electronic still camera recording/reproducing circuit with simple circuit constitution and with excellent signal quality by simultaneously connecting a recording circuit and a reproducing circuit to a magnetic head and supplying a power source to a recording current amplifying transistor through a diode. SOLUTION: An FM modulated recording signal SIG1 is inputted to a current amplifying transistor Q1 through a recording amplifier A1 after through a recording gate. The power is supplied to the Q1 through a diode D1 and a parallel circuit of an inductance L1 and a damping resistance R1. Since the DC resistance of the L1 is negligibly small, and the collector DC potential of the Q1 becomes close to the potential of VCC1, a voltage signal amplitude amplified by the Q1 is taken large. The recording signal generated on the collector of the Q1 is supplied to the magnetic head H1 for both recording/reproducing through a capacitor C1. A regenerative signal read out from the magnetic head H1 is supplied to a reproducing amplifier A2 through the capacitor C2 to be reproduced and outputted. |
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