Abstract: A semiconductor package and die assembly with a package having an exterior surface and an interior space, the interior space defined by a first side wall, and a second side wall that opposes the first side wall. Also part of the assembly is a package floor and a package ceiling. The package floor includes package floor conductors. The package ceiling opposes the package floor and includes package ceiling conductors in the package ceiling. One or more semiconductor dies are on the floor of the package floor. Electrical conductors electrically connect the one or more floor dies to the package floor conductors. One or more semiconductor dies are located on the package ceiling. Electrical conductors are configured to electrically connect the one or more ceiling dies to the package ceiling conductors. An air space is located between the package floor and the package ceiling.

Abstract: A semiconductor package and die assembly with a package having an exterior surface and an interior space, the interior space defined by a first side wall, and a second side wall that opposes the first side wall. Also part of the assembly is a package floor and a package ceiling. The package floor includes package floor conductors. The package ceiling opposes the package floor and includes package ceiling conductors in the package ceiling. One or more semiconductor dies are on the floor of the package floor. Electrical conductors electrically connect the one or more floor dies to the package floor conductors. One or more semiconductor dies are located on the package ceiling. Electrical conductors are configured to electrically connect the one or more ceiling dies to the package ceiling conductors. An air space is located between the package floor and the package ceiling.

Abstract: A current control mechanism for use in low power consumption circuits with limited headroom includes a differential transistor pair from whose collectors a current output is taken. The current output is a function of a reference voltage provided at bases of a reference transistor pair having emitters that are coupled to the bases of the differential pair. The reference voltage is controlled by a pair of control transistors that control current through a load. A pair of tracking transistors can be provided to track supply voltage. A single-ended topology can also be implemented.

Abstract: A current supply circuit provides current that is substantially invariant with voltage supply and temperature changes. The current supply circuit has an input node connectable to a voltage supply and an output node operable to provide an output current. The current supply circuit includes a current source circuit coupled to a reference voltage node and configured to provide the output current at the output node, wherein a voltage at the reference voltage node controls current output of the current source circuit. The current supply circuit also includes a reference-setting circuit coupled to the reference voltage node and operable to establish a reference current level of the current source circuit, a common-emitter circuit coupled to the input node, and an emitter-follower circuit coupled to the input node, the emitter-follower circuit having an input coupled to an output of the common-emitter circuit and an output coupled to the reference voltage node.

Abstract: A current control mechanism for use in low power consumption circuits with limited headroom includes a differential transistor pair from whose collectors a current output is taken. The current output is a function of a reference voltage provided at bases of a reference transistor pair having emitters that are coupled to the bases of the differential pair. The reference voltage is controlled by a pair of control transistors that control current through a load. A pair of tracking transistors can be provided to track supply voltage. A single-ended topology can also be implemented.

Abstract: A current control mechanism for use in low power consumption circuits with limited headroom includes a differential transistor pair from whose collectors a current output is taken. The current output is a function of a reference voltage provided at bases of a reference transistor pair having emitters that are coupled to the bases of the differential pair. The reference voltage is controlled by a pair of control transistors that control current through a load. A pair of tracking transistors can be provided to track supply voltage. A single-ended topology can also be implemented.