Modulator structure for a transmitter and a mobile station
AssigneeNokia Mobile Phones Ltd.
InventorsHarri Kimppa, Simo Murtojarvi, Markus Pettersson
Life of this patent
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Abstract
A modulator having a high signal-to-noise ratio. The modulator comprises a switching arrangement and a driver arrangement coupled to the switching arrangement, said driver arrangement comprising driver components and among the driver components a low-pass filter arrangement. The modulator can be used, for example, in the transmitters of dual-band mobile stations without separate filters for each frequency band.
Claims12
A modulator comprising a switching arrangement and a driver arrangement coupled to the switching arrangement, said driver arrangement comprising current mirrors and said current mirrors comprising a pair of transistors with at least one low-pass filter arrangement located between the pair of transistors to filter the signal path between the pair of transistors.
A mobile station comprising a transceiver whose modulator arrangement comprises a switching arrangement and a driver arrangement coupled to the switching arrangement, said driver arrangement comprising current mirrors and said current mirrors comprising a pair of transistors with at least one low-pass filter arrangement located between the pair of transistors to filter the signal path between the pair of transistors.
Dependencies are inferred from the claim text.