Balanced phase splitting circuit

Details Balanced phase splitting circuit Balanced phase splitting circuit

1995-02-10

1997-03-04

Zele, Krista M.

Telephonic communications

Subscriber line or transmission line interface

Hybrid circuit

379403, 327254, 327255, 327256, 327257, H03F 304

Patent

active

056087969

ABSTRACT:
Disclosed is an integrated circuit comprising a balanced set of inputs and a phase splitting circuit. The phase splitting circuit has a first input terminal that is coupled to the balanced set of inputs and a second input terminal that is coupled to the balanced set of inputs. The phase splitting circuit further comprises a balanced phase shifting network, a first set of output terminals, and a second set of output terminals. The balanced phase shifting network is coupled to the first: input terminal and the second input terminal. The first set of output terminals provides a voltage representative of a first voltage across a resistive portion of the balanced phase shifting network in response to an input voltage at the balanced set of inputs. The second set of output terminals provides a voltage representative of a second voltage across a reactive portion of the balanced phase shifting network in response to the input voltage at the balanced set of inputs.

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Tsukahara et al., "A 2V 2 GHz Si-Bipolar Direct-Conversion Quadrature Modulator," IEEE ISSCC, 40-41 (1994).
Boveda et al., "A 0.7-3 GHz GaAs QPSK/QAM Direct Modulator," Digest of Technical Papers, IEEE ISSCC, 142-143 (1993).

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