Enhanced low inductance interconnections between electronic and opto-electronic integrated circuits
View Patent ↗A configuration for routing electrical signals between a conventional electronic integrated circuit (IC) and an opto-electronic subassembly is formed as an array of signal paths carrying oppositely-signed signals on adjacent paths to lower the inductance associated with the connection between the IC and the opto-electronic subassembly. The array of signal paths can take the form of an array of wirebonds between the IC and the subassembly, an array of conductive traces formed on the opto-electronic subassembly, or both.
1. An arrangement for providing a low inductance electrical connection between an electronic integrated circuit and an opto-electronic subassembly for communicating a complementary-encoded data signal therebetween, defined as a DATA signal component and a DATA signal component, the arrangement comprising
an array of parallel signal paths disposed between the electronic integrated circuit and a predetermined location on the opto-electronic subassembly, the array including
a first set of signal paths for carrying the DATA signal component; and
a second set of signal paths for carrying the DATA signal component, wherein the signal paths forming the first set and the second set are interleaved such that oppositely-signed signals are carried on adjacent signal paths so as to create a low inductance within the array of parallel signal paths.
2. An arrangement as defined in claim 1 wherein the array of parallel signal paths comprises an array of wirebonds formed between the electronic integrated circuit and a plurality of separate bondpads on the opto-electronic subassembly, with the wirebonds forming the first set disposed in an interleaved configuration with the wirebonds forming the second set.
3. An arrangement as defined in claim 1 wherein the array of parallel signal paths comprises an array of conductive traces formed within the opto-electronic subassembly, a first set of conductive traces coupled to receive the DATA signal component from the electronic integrated circuit and a second set of conductive traces coupled to receive the DATA signal component from the electronic integrated circuit, the first set of conductive traces interleaved with the second set of conductive traces to form a low inductance array connection.
4. An arrangement as defined in claim 1 wherein the array of parallel signal paths comprises
an array of wirebonds formed between the electronic integrated circuit and a plurality of separate bondpads on the opto-electronic subassembly, with the wirebonds forming the first set disposed in an interleaved configuration with the wirebonds forming the second set; and
an array of conductive traces coupled between the plurality of separate bondpads and a predetermined location on the opto-electronic subassembly, with the first set of conductive traces interleaved with the second set of conductive traces to form a low inductance array connection.
5. An arrangement as defined in claim 1 , further comprising an optical modulator within the opto-electronic subassembly, the DATA and DATA signal components applied as separate inputs to the optical modulator.
6. An arrangement as defined in claim 5 wherein the optical modulator comprises a multi-segment optical modulator with each modulator arm including a plurality of separate modulating sections, each modulating section responsive to a separate low inductance connection in the form of the array of separate signal paths.