On-chip method of balancing memory detectors and balanced detectors formed thereby

In a magnetic bubble device having structure for supporting bubbles thereon and elements disposed in an arrangement in which bubbles propagate serially in response to a rotating in-plane magnetic field,

• detector means for receiving said bubbles and for detecting the presence or absence of said bubbles and producing electrical signals representing the presence or absence of said bubbles in said detector means, and
• resistance matching means in-line with the output of said detector means whose resistance may be varied to balance the detector means for maximum amplitude of the signals to a signal processing means.

In a magnetic bubble device having structure for supporting bubbles thereon and elements disposed in an arrangement in which bubbles propagate serially in response to a rotating in-plane magnetic field,

• detector means for receiving said bubbles and for producing electrical signals representing the presence or absence of said bubbles in said detector means,
• wherein said detector means includes a bridge network with a first detector means in the bubble propagation path having a resistance which varies in response to the presence or absence of said bubbles, a second detector means out of the bubble propagation path having a fixed resistance, and a resistance matching means associated with each detector to balance the bridge network,
• said resistance matching means being comprised of uniformly spaced apart end connected lines with traverse legs that are spaced apart at variable distances from one another so that portions of the uniformly spaced apart lines may be disconnected in increments representing weighted resistive values.