H - Electricity – 03 – K
Patent
H - Electricity
03
K
329/11, 328/29
H03K 17/68 (2006.01) H03D 1/22 (2006.01) H03D 3/00 (2006.01) H04B 1/00 (2006.01) H04B 1/16 (2006.01) H04B 1/28 (2006.01) H04B 3/00 (2006.01) H04H 5/00 (2006.01)
Patent
CA 1039365
ABSTRACT OF THE DISCLOSURE A signal transfer circuit suitable for a monolithic integrated circuit is operable to transfer only a desired DC biasing voltage and AC signal component from an FM discriminator output to a multiplex stereo demodulator circuit or the like at its rear stage, with a DC component contained in the FM discriminator output being cancelled and hence not transferred. The signal transfer circuit is composed of a parallel connection of a first lopp including a first FM discriminating signal source and a first resistor connected in series to each other, and a second loop consisting of a second FM discriminating signal source providing an output signal which is of the same level but of reverse phase in respect to the output signal of the first discriminating signal source, second and third resistors connected in series to the second signal source, and an AC signal by-pass capacitor connected between a connection point between the second and third resistors and a reference point. A connected point of the above-mentioned parallel connection is connected to a DC biasing voltage source and the other connection point thereof is connected to an output terminal of the signal transfer circuit.
262343
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