G - Physics – 11 – B
Patent
G - Physics
11
B
352/20
G11B 21/10 (2006.01) G11B 5/035 (2006.01) G11B 15/14 (2006.01) G11B 20/02 (2006.01) H04N 5/76 (2006.01) H04N 5/931 (2006.01)
Patent
CA 1180111
PHO.81-502 19 21.12.81 "ABSTRACT": "Reproducing apparatus" A reproducing apparatus (1) for information signals recorded on a record carrier (2) in the form of a tape comprises two rotatable reproducing heads (11, 12) for alternately reproducing the information signals and a position encoder (19) which supplies position pulses for determinging the rotary position of the reproducing heads. A common pre-amplifier (22) is connected to the reproducing heads (11, 12), which amplifier is followed by compensation circuits (30, 31) associated with the two reproducing heads for signal correction, the output signal supplied by the compensation circuit associated with the reproducing head which instantaneously co-operates with the record carrier being applied to a signal processing circuit (23) during the scanning period of the relevant reproducing head de- pending on the position pulses. Only one of the two compen- sation stages (30, 31) comprises an adjustable frequency- dependent network (38) for frequency-response correction and at least one of the two compensation stages comprises a further adjustable frequency-independent network (39) for amplitude correction. This enables -the frequency response and -the amplitude characteristics of the two reproducing heads (11, 12) to be adapted to each other (Fig, 1).
395612
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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