摘要:
Embodiments of the present invention provide a system that electronically aligns mini-bars on different semiconductor chips which are situated face-to-face to facilitate communication between the semiconductor chips through capacitive coupling. During operation, the system selects a group of transmitter mini-bars on the first chip to form a transmitter bit position and selects a group of receiver mini-bars on the second chip to form a receiver bit position. The system then associates transmitter bit positions on the first chip with proximate receiver bit positions on the second chip. In this way, the system allows data signals transmitted by the mini-bars within a transmitter bit position on the first chip to be collectively received by the mini-bars within an associated receiver bit position on the second chip.
摘要:
One embodiment of the present invention provides a system that electronically aligns mini-bars on different semiconductor chips which are situated face-to-face to facilitate communication between the semiconductor chips through capacitive coupling. During operation, the system measures an alignment between a first chip and a second chip. The system then selects a group of transmitter mini-bars on the first chip to form a transmitter bit position based on the measured alignment. In this way, the system allows a data signal to be distributed to and transmitted by the mini-bars that form the transmitter bit position. The system also selects a group of receiver mini-bars on the second chip to form a receiver bit position based on the measured alignment. Next, the system associates transmitter bit positions on the first chip with proximate receiver bit positions on the second chip based on the measured alignment. In this way, the system allows data signals transmitted by the mini-bars within a transmitter bit position on the first chip to be collectively received by the mini-bars within an associated receiver bit position on the second chip.
摘要:
Embodiments of the present invention provide a system that electronically aligns mini-bars on different semiconductor chips which are situated face-to-face to facilitate communication between the semiconductor chips through capacitive coupling. During operation, the system selects a group of transmitter mini-bars on the first chip to form a transmitter bit position and selects a group of receiver mini-bars on the second chip to form a receiver bit position. The system then associates transmitter bit positions on the first chip with proximate receiver bit positions on the second chip. In this way, the system allows data signals transmitted by the mini-bars within a transmitter bit position on the first chip to be collectively received by the mini-bars within an associated receiver bit position on the second chip.
摘要:
An apparatus and method for a sensing circuit for cancelling an offset voltage. Specifically, in one embodiment, a CMOS inverter amplifier amplifies an input signal present at an input node. A resistive feedback circuit is coupled to the CMOS inverter amplifier for cancelling an offset voltage that is associated with the CMOS inverter amplifier. This is accomplished by biasing the CMOS inverter amplifier to its threshold voltage. A bias circuit is coupled to the resistive feedback circuit for biasing MOSFET transistors in the resistive feedback circuit at a subthreshold conduction region. As such, the resistive feedback circuit presents a high impedance to the input node. A clamping circuit, coupled to the resistive feedback circuit, maintains operation of the transistors in the resistive feedback circuit in the subthreshold conduction region.
摘要:
One embodiment of the present invention provides a system for capacitively probing electrical signals within an integrated circuit. This system operates by placing a probe conductor in close proximity to, but not touching, a target conductor within the integrated circuit. In this position, the probe conductor and the target conductor form a capacitor that stores a charge between the probe conductor and the target conductor. Next, the system detects a change in a probe voltage on the probe conductor caused by a change in a target voltage on the target conductor, and then determines a logic value for the target conductor based on the change in the probe voltage. In one embodiment of the present invention, determining the logic value for the target conductor involves, determining a first value if the probe voltage decreases, and determining a second value if the probe voltage increases.
摘要:
One embodiment of the present invention provides a system that facilitates capacitive inter-chip communication. During operation, the system first determines an alignment between a first semiconductor die and a second semiconductor die. Next, electrical signals are selectively routed to at least one interconnect pad in a plurality of interconnect pads based on the alignment thereby facilitating communication between the first semiconductor die and the second semiconductor die. The plurality of interconnect pads can include transmitting pads, receiving pads, and transmitting and receiving pads. The alignment may be determined continuously or at times separated by an interval, where the interval is fixed or variable. Several variations on this embodiment are provided.
摘要:
One embodiment of the present invention provides an electronic circuit and method for measuring a capacitance. A signal generating mechanism generates a signal having a predefined frequency and predefined low and high voltage levels on one terminal of the capacitance. The other terminal of the capacitance is coupled to a switching mechanism. The switching mechanism is set to couple the other terminal of the capacitance to a first amplifier or a second amplifier for a portion of each signal cycle thereby full-wave rectifying a transient current flowing between the two terminals in the capacitance. Outputs of the first amplifier and the second amplifier are coupled to a current measurement mechanism for measuring the current. The capacitance is determined from the measured current. Several variations on this embodiment are provided.
摘要:
One embodiment of the present invention provides an electronic circuit and method for measuring a capacitance. A signal generating mechanism generates a signal having a predefined frequency and predefined low and high voltage levels on one terminal of the capacitance. The other terminal of the capacitance is coupled to a switching mechanism. The switching mechanism is set to couple the other terminal of the capacitance to a first amplifier or a second amplifier for a portion of each signal cycle thereby full-wave rectifying a transient current flowing between the two terminals in the capacitance. Outputs of the first amplifier and the second amplifier are coupled to a current measurement mechanism for measuring the current. The capacitance is determined from the measured current. Several variations on this embodiment are provided.
摘要:
One embodiment of the present invention provides a system that uses electrostatic forces to align semiconductor chips relative to each other. The system operates by fabricating a first set of conductors on the top surface of a first chip and fabricating a corresponding second set of conductors on the top surface of a second chip. To align the chips, the system electrically charges the first set of conductors and the second set of conductors. The system also places the first chip face-to-face with the second chip, so that the first set of conductors is in close proximity to the second set of conductors. This allows electrostatic forces between the first set of conductors and the second set of conductors to bring the first chip into alignment with the second chip and to hold them in place.
摘要:
One embodiment of the present invention provides a capacitively-coupled receiver amplifier that has an input with no DC coupling. A DC voltage is programmed on the input. During programming, a transmitter is held at a voltage at a midpoint between a voltage that represents a logical “1” and a voltage that represents a logical “0” and the input voltage of the receiver amplifier is programmed to be substantially the switching-threshold voltage for the receiver amplifier. Then, during normal data communication, the transmitter drives high and low electrical signals that are coupled to the receiver amplifier. Since the input of the receiver amplifier has been substantially set to the DC voltage, the receiver amplifier need not control the DC voltage of the input for each transition in the electrical signals.