Patent ID: 7994852
Filing Date: 2011-08-09
Classification: H03D,H03F,H04L

Abstract:
1. An electronic circuit comprising: a circuit that generates a first input signal and a second input signal that are balanced differential signals; a first envelope detection circuit that includes a first input terminal, a second input terminal, and a first output terminal, the first input signal being input to the first input terminal via a first impedance element, the second input signal being input to the second input terminal via a second impedance element, and outputs from the first output terminal a first output signal that is a sum of the square of the first input signal and the square of the second input signal; a second envelope detection circuit that includes a third input terminal, a fourth input terminal, and a second output terminal, the first input signal being input to the third input terminal via a third impedance element, the second input signal being input to the fourth input terminal via a fourth impedance element, and outputs from the second output terminal a second output signal that is twice a value obtained by squaring the average of the first input signal and the second input signal; and a differential circuit that generates a differential signal from the first output signal and the second output signal.