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US 2003/0076080 A1Published application
Linear power conversion circuit
AssigneeKoninklijke Philips Electronics N.V.
InventorLuan Le
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AssigneeKoninklijke Philips Electronics N.V.
InventorLuan Le
Estimating the term…
The invention relates to a conversion circuit to convert a differential power signal II[1], II[2] into a differential output current IC[1], IC[2], said circuit including conversion means CONV and regulation means REG for the input impedance of the circuit connected to the conversion means CONV. The regulation means REG according to the invention include negative feedback means to control a regulating current IREG taken from each component of the power signal II[1], II[2] as a function of the values of the potentials V[1], V[2] at the inputs of the conversion circuit. The half-sum between the two potentials V[1], V[2] at the inputs of the circuit is advantageously used to guide the negative feedback which can advantageously be applied to the bases of the regulation transistors controlling the value of the regulating current. The invention permits mixers of great precision to be produced and can be used in any signal processing apparatus using power conversion circuits and, in particular, mixers.
A conversion circuit for converting a differential power signal composed of a first signal supplied on a first common node and a second signal supplied on a second common node, into a differential output current composed of a first and a second current, said circuit having a first output supplying the first current and a second output supplying the second current, said circuit including:
Dependencies are inferred from the claim text.