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US 9,438,267 B2Granted
Apparatus and method for digital to analog conversion with current mirror amplification
AssigneeInnophase, Inc.
InventorsXuejun Zhang, Yang Xu
Life of this patent
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AssigneeInnophase, Inc.
InventorsXuejun Zhang, Yang Xu
Estimating the term…
A DAC using current mirrors suitable for use in a modulator. Embodiments include a current-generating circuit to provide an information signal; a bias current source; a current mirror having a mirror input transistor connected to the current generating circuit and the bias current source, and being driven by the bias current and the varying current signal and having a corresponding varying voltage signal at a control terminal; a signal shaping filter interposed between the mirror input transistor and an output mirror transistor configured to limit a bandwidth of the varying voltage signal; the output mirror transistor configured to generate a band-limited varying current signal and a mirrored bias current; and, a mirrored bias current reduction circuit connected to the output mirror transistor configured to reduce the mirrored bias current.
A method comprising:
A method comprising:
Dependencies are inferred from the claim text.