| 摘要 |
<p>The present invention relates to a radio frequency circuit, comprising a differential input stage, which links up with a cascaded capacitive stage, wherein the input stage is formed by a pair of transistors and wherein the imaginary part of the input stage current is at least substantially faded out by the capacitive stage. The imaginary part of the input current of a transistor is provided by currents originating from capacitors which are connected between the input node and other nodes in the circuit which have a different phase than the input node. The invention obviates the requirement of very high quality inductors by using internal phase differences on different nodes in an active network and is particularly suited for wireless products such as pagers and mobile telephone.</p> |
