Double balanced diode mixer with d.c. response

Details Double balanced diode mixer with d.c. response Double balanced diode mixer with d.c. response

1979-02-26

1980-11-18

Safourek, Benedict V.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

329146, 307321, H04B 126

Patent

active

042349664

ABSTRACT:
A direct current responsive mixing circuit (10) includes three mixers (14, 16 & 18), each having one D.C. port and two A.C. ports. The D.C. ports are responsive to D.C. and A.C. signals, while the A.C. ports are responsive only to A.C. signals. One mixer (14) has an A.C. port (24) receiving a pump signal and a D.C. port (28) receiving an I input signal. A second mixer (16) has an A.C. port (26) receiving the pump signal and a D.C. port (32) receiving a Q input signal. The remaining A.C. ports of the first two mixers (14 and 16) are connected to the two A.C. ports (36 and 38) of the third mixer (18). An output signal having a component corresponding to the product of the I and Q input signals is produced at the D.C. port (40) of the third mixer (18). In this construction, the mixing circuit 10 is responsive to A.C. and D.C. input signals and may produce a D.C. output signal component.

REFERENCES:
patent: 2519223 (1950-08-01), Cheek
patent: 3159790 (1964-12-01), Pratt
patent: 3390343 (1968-06-01), Carter
patent: 3517338 (1970-06-01), Herman et al.
patent: 3622895 (1971-11-01), Starkey et al.
patent: 3831097 (1974-08-01), Neuf
patent: 3925136 (1975-12-01), Lohrmann
patent: 3973201 (1976-08-01), Andren

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