Cascode single-ended to differential converter

Details Cascode single-ended to differential converter Cascode single-ended to differential converter

1997-03-20

1999-07-27

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including balanced to unbalanced circuits and vice versa

330311, 455333, H03F 304, H04B 128

Patent

active

059297107

ABSTRACT:
A cascode single-ended to differential converter has particular applications for use in communication, e.g. RF circuits. The converter provides higher gain, reduced noise figure and improved output level and linearity over the prior art differential pair converter. The present converter is a transconductor, converting an input voltage to a differential current output signal, i.e., two output signals of different currents, with the difference being linear to the level of voltage. The cascode amplifier output signal is used to produce a signal equal in the amplitude but 180 degrees out of phase with the signal produced by the cascode amplifier.

REFERENCES:
patent: 2830133 (1958-04-01), Ranks
patent: 4001706 (1977-01-01), Prins et al.
patent: 4956615 (1990-09-01), Bohme et al.
patent: 5497123 (1996-03-01), Main et al.
Durec et al., "Motorola's Mosaic V Silicon Bipolar RF Building Blocks Fill Gaps in High Performance, Low Power Wireless Chips" Wireless Symposium, 1996, pp. 218-219.

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