Viasat, Inc.

Primarion Corporation

David W Self

Benjamim Tang

David W Corman

Donald E Crockett, Iii

C Phillip McClay

Glenn Diemond

Kevin Miyashiro

An integrated circuit can comprise: a first port, a second port, and a third port; and a plurality of microwave operational amplifiers coupled to each other and the first port, the second port, and the third port. The plurality of microwave operational amplifiers can be arranged to substantially pass a signal provided to the first port to the second port while substantially isolating the signal provided to the first port from the third port; the plurality of microwave operational amplifiers can be arranged to substantially pass a signal provided to the second port to the third port while substantially isolating the signal provided to the second port from the first port; and the plurality of microwave operational amplifiers can be arranged to substantially pass a signal provided to the third port to the first port while substantially isolating the signal provided to the third port from the second port.

Active lumped element circulator

An integrated circuit device can include a radio-frequency device and a hard-wired lookup table. The radio-frequency device can have an analog input, a digital control input, and an analog output. An unadjusted transfer response of the analog output relative to the analog input and the digital control input can differ from an ideal transfer response. The hard-wired lookup table can be connected to the digital control input of the radio-frequency device to generate a modified digital control input based on a predetermined function. This can have the effect that the adjusted transfer response of the analog output relative to the analog input and the modified digital control input is closer to the ideal transfer response than the unadjusted transfer response of the analog output relative to the analog input and the digital control input. The predetermined function can be defined by metallization connections within the integrated circuit device.

Digital compensation technique using area efficient tri-state architecture

Disclosed is a system and circuit for a multi-channel optoelectronic device driver. The system and circuit include a differential buffer amplifier, an output driver amplifier, a dedicated voltage regulator, a load compensation circuit, a wave shaping circuit and a laser fault detection circuit. In a multi-channel configuration, each channel has a dedicated voltage regulator such that each channel provides a channel-specific drive signal.

System and circuit for a multi-channel optoelectronic device driver

Disclosed is current driver circuit comprising a bandgap reference circuit for generating a fixed current and a current proportional to absolute temperature (PTAT), a temperature compensator for combining the fixed and PTAT currents and forming first and second temperature compensated currents, a current control circuit for modifying said first and second temperature compensated currents in response to signals representing the characteristics of a load device and a driver circuit for amplifying and supplying a selected one of said first and second temperature compensated currents to said load device. Also disclosed is a method of supplying a precisely controlled current by generating a constant current and a current proportional to absolute temperature (PTAT), combining these two currents and providing temperature compensated currents, modifying the temperature compensated currents with a programmed reference signal and supplying a precisely controlled current to a load device.

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Tempe, AZ, United States of America

David W Self