Radio frequency signal device biasing circuit
A circuit including a pair of radio frequency signal devices to each of which are connected in parallel a respective input or output and a respective dc bias input device for biasing the respective radio frequency signal device; each dc bias input device including a radio frequency transistor and at least two different types of inductors.
1 . A circuit including a pair of radio frequency signal devices to each of which are connected in parallel a respective input or output and a respective dc bias input device for biasing the respective radio frequency signal device; each dc bias input device including a radio frequency transistor and at least two different types of inductors.
2 . A circuit according to claim 1 , wherein the pair of radio frequency signal devices together constitute part of a differential driver.
3 . A circuit according to claim 1 , wherein each dc bias input device includes a radio frequency transistor having a F T value greater than or equal to 25 MHz.
4 . A circuit according to claim 1 , wherein the at least two types of inductors have different Q factors.
5 . A circuit according to claim 1 , wherein said two types of inductors include a coil inductor and a ferrite bead inductor.
6 . A circuit according to claim 1 , wherein the two dc bias input devices share a common power supply.
7 . A system for producing an optical signal, including a pair of radio frequency signal input devices to each of which are connected in parallel a respective output and a respective dc bias input device for biasing the respective radio frequency signal input device; each dc bias input device including a radio frequency transistor and at least two different types of inductors; and further including an optic device connected to at least one of said outputs.
8 . A system according to claim 7 , wherein said optic device is connected to both of said outputs.
9 . A system according to claim 7 , wherein said optic device is connected to only one of said outputs, and a dummy load is connected to another of said outputs.
10 . A system for producing an optical signal according to claim 7 , wherein the two radio frequency signal input devices constitute part of a differential driver.
11 . A system for producing an optical signal according to claim 7 , wherein the optical device is a laser diode or an external modulator.
12 . A system for producing an optical signal according to claim 7 , wherein the two dc bias input devices share a common power supply.
13 . A circuit including a radio frequency signal device to which are connected in parallel an input or output and a dc bias input device for biasing the radio frequency signal device:
the dc bias input device including a radio frequency transistor and at least two different types of inductors.
14 . A circuit as claimed in claim 13 , wherein the at least two types of inductors include a coil inductor and a ferrite bead inductor.
15 . A circuit as claimed in claim 13 , wherein the at least two types of inductors have different Q factors.
16 . A circuit as claimed in claim 13 , further including a capacitive element connected to said input or output in parallel with the dc bias input device and the radio frequency signal device.
17 . A system for producing an optical signal including: a radio frequency signal input device to which are connected in parallel an optical device for producing an optical signal and a dc bias input device for biasing the radio frequency signal input device, the dc bias input device including a radio frequency transistor and at least two different types of inductors.
18 . A system for producing an optical signal according to claim 17 , wherein the optical device is a laser diode or an external modulator.