Abstract: A flexible electro-optic circuit board (20) includes a polymer circuit board (22) and a polymer optical backplane (34). The polymer circuit board (22) includes a plurality of circuit elements (50, 52). The polymer optical backplane (34) has a plurality of optical transmission lines (44). A plurality of optical vias (30) couple the polymer circuit board (22) to the polymer optical backplane (34).

Abstract: An adaptive encoder (10) provides a fixed upper limit on the number of consecutively transmitted data bits at a particular data bit location of a data word having a common logic value. A coder circuit (44) provides prioritization for a storage comparator register (102) to determine when data in a data channel (32) should be complemented. An invert circuit (58) complements the data in the data channel (32) when an upper limit of consecutive transmitted data bits have common logic values.

Abstract: A signal processing circuit (10) performs a sample and hold (16) of an input signal (14) and stores a maximum value of the input signal (18). A guardband signal (21) is developed that is less than the maximum value that is stored. The input signal is compared to the guardband signal to determine if the input signal is above or below the guardband signal. A threshold signal (25) is developed by taking a percentage of the maximum value that is stored. The input signal is compared to the threshold signal to regenerate the input waveform. If the input signal is below the guardband signal and above the threshold signal, the sample and hold circuit is reset to acquire a new maximum value of the input signal so that a new threshold can be used for regenerating the input signal.

Abstract: A data transmitter (12) transmits parallel data as light pulses over multiple optical channels (14). A data receiver (16) converts the light pulses back to a voltage level and compares the voltage level to a reference capacitor voltage (42). The capacitor voltage should maintain a mid-range value for proper noise margin in detecting logic ones and logic zeroes. Any long series of consecutive logic ones or zeroes causes the capacitor voltage to charge or discharge toward the same level as the data voltage, which causes data errors. To prevent the data errors, the data is encoded (18) by inverting certain bits to break up the long series of consecutive logic states. The encoding information is transmitted as a transmitted clock to the data receiver over another fiber optic channel. The decoding information is retrieved (20) so that the encoded data can be converted back to proper logic states.

Abstract: An optoelectric interconnect (70) includes an optical fiber (17) coupled to a ferrule (11) and an optoelectric board (20). Metal layer (14) is disposed over a surface (12) of the ferrule (11). An optoelectric device (61) is coupled to the optoelectric board (20) using tape automated bonding tapes (47, 51). The optoelectric board (20) and the ferrule (11) are positioned adjacent each-other so that optical radiation is transmitted from the optoelectric device (61) to the optical fiber (17). The position of the optoelectric device (61) is adjusted to achieve an optimum position which is characterized by a maximum optical radiation transmitted to the optical fiber(17). Upon achieving the optimum position, two bonding strips (54, 56) are fused with the metal layer (14) on the surface (12) of the ferrule (11).

Abstract: A circuit for realizing controllable analog weights as used, for example, in template matching circuits. Analog weights are obtained by storing charge on two primary capacitors and by controlling the potential difference between the two primary capacitors. The control of charge on the two capacitors is effected with a bridging connection between the two primary capacitors. In one embodiment, the bridging connection contains two switches and an MOS transistor.