ROTATING MAGNETIC HEAD PIEZO-ELECTRIC ASSEMBLY AND DRIVE CIRCUITRY FOR VIDEO TAPE RECORDER

摘要

SO1146S79P13MAGNETIC HEAD ASSEMBLY FOR VIDEO TAPE RECORDERABSTRACT OF THE DISCLOSUREA magnetic head assembly for a video tape recorderincludes a piezo-electric support, preferably constituted bya bi-morph leaf or leaves, supported at one end, for example, ona rotary portion of a tape guide drum, and a magnetic headmounted at the other end of the piezo-electric support, andthe piezo-electric support has two pairs of first and secondelectrodes secured on opposed major surfaces, respectively, ofthe support and extending in the direction between the ends ofthe support, that is, in the lengthwise. direction of the latter,with such pairs of electrodes being parallel and spaced fromeach other in the direction across the support. Thus, byapplying suitable control voltages between the first and secondelectrodes of the two pairs thereof, the piezo-electric supportcan be made to flex or bend longitudinally and/or torsionally,for example, for correcting tracking errors and/or for varyingthe azimuth angle, respectively, of the mounted head.