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US 6,150,852 AGranted
Active differential to single-ended converter
AssigneeQUALCOMM Incorporated
InventorVladimir Aparin
Life of this patent
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Abstract
Many applications require the conversion of a differential current signal into a single-ended signal. The shortcomings encountered with existing approaches include poor conversion efficiency, limited bandwidth, and large size. The converter disclosed uses active devices to obtain a unit of small size and high efficiency having a wide bandwidth of operation.
Claims25
A circuit for converting a differential current signal to a single-ended signal, comprising:
- an active device having a control terminal, a charge-producing terminal, and a charge-collecting terminal;
- and
- a resistance having two terminals;
- wherein a bias potential is applied at least indirectly to the charge-producing terminal of said active device;
- and
- wherein one of the two terminals of said resistance is connected to the charge-collecting terminal of said active device, and the other of the two terminals of said resistance is connected to the control terminal of said active device;
- and
- wherein the differential current signal is applied to the terminals of the resistance, and the single-ended signal is outputted at the charge-collecting terminal of said active device.
5 more elements
Dependencies are inferred from the claim text.