Patent ID: 7593700

Claim:
An electronic device comprising: a controllable radio frequency stage with variable gain/attenuation comprising an analog multiplier cell comprising at least one input for receiving an input current comprising a DC component and a radio frequency dynamic component, a controllable current source for delivering a DC control current, a current multiplication circuit for generating an output current whose radio frequency dynamic component is equal to a product of a dynamic component of the input current times a multiplier coefficient dependent on a ratio between a value proportional to that of the DC control current and a value of the DC component of the input current, and at least one output for delivering the output current; and an analog current routing cell comprising at least one input coupled to said at least one output of said analog multiplier cell, a controllable voltage source for delivering a control voltage, at least one output, and a routing circuit for routing a part of the input current to the at least one output of said analog current routing cell as a function of the value of the control voltage.