US 5,963,858 A · Method and apparatus for mixing signals

Abstract

An apparatus includes a first mixer port (12), a second mixer port (14), a third mixer port (16), a first hybrid device (20) responsive to the first mixer port (12) and having a first and a second input/output port, a second hybrid device (40)responsive to the second mixer port (14), the third mixer port (16) responsive to the second hybrid device (40), and a switching device (30). The switching device (30) includes a first port (31) responsive to the first input/output port of the first hybrid device (20), a second port (32) responsive to the second port of the first hybrid device (20),a third port (34) in communication with the second hybrid device (40), a fourth port (36) in communication with the second hybrid device (40), and a switching element responsive to the first, second, third, and fourth ports (31, 32, 36, 34). The switching element includes a first field effect transistor (60) and a second field effect transistor (62). The first field effect transistor (60) is responsive to the first port (31) and is coupled to the third port (34), and the second field effect transistor (62) is responsive to the second port (32) and is coupled to the fourth port (36).

Claims17

Dependent claims

An apparatus for mixing radio frequency signals, the apparatus comprising:

a first mixer port;
a second mixer port;
a third mixer port;
a first hybrid device responsive to the first mixer port and having a first and a second input/output port;
a second hybrid device responsive to the second mixer port, the third mixer port responsive to the second hybrid device;
a switching device comprising:
a first port responsive to the first input/output port of the first hybrid device;
a second port responsive to the second input/output port of the first hybrid device;
a third port in communication with the second hybrid device;
a fourth port in communication with the second hybrid device;
and
a switching element responsive to the first, second, third, and fourth ports, the switching element comprising a first field effect transistor and a second field effect transistor, the first field effect transistor responsive to the first port and coupled to the third port and the second field effect transistor responsive to the second port and coupled to the fourth port;
and
a third hybrid device responsive to the first and second hybrid devices, the third hybrid device coupling the first hybrid device and the second hybrid device to the second mixer port.

11 more elements

A signal mixing apparatus comprising:

a first mixer port;
a second mixer port;
a third mixer port;
a first mixing device comprising:
a first hybrid device responsive to the first mixer port and having a first and a second input/output port;
a second hybrid device responsive to the second mixer port, the mixer port responsive to the second hybrid device;
and
a switching device comprising:
a first port responsive to the first input/output port of the first hybrid device;
a second port responsive to the second input/output port of the first hybrid device;
a third port in communication with the second hybrid device;
a fourth port in communication with the second hybrid device;
and
a switching element responsive to the first, second, third, and fourth ports;
a second mixing device comprising:
a first hybrid device responsive to the first mixer port and having a first and a second input/output port;
a second hybrid device responsive to the second mixer port, the mixer port responsive to the second hybrid device;
and
a switching device comprising:
a first port responsive to the first input/output port of the first hybrid device;
a second port responsive to the second input/output port of the first hybrid device;
a third port in communication with the second hybrid device;
a fourth port in communication with the second hybrid device;
and a switching element responsive to the first, second, third, and fourth ports;
and
a third hybrid device responsive to the first and second mixing devices, the third hybrid device coupling the second hybrid device of the first mixing device and the second hybrid device of the second mixing device to the second mixer port.

23 more elements

Dependencies are inferred from the claim text.

Method and apparatus for mixing signals

Life of this patent

Method and apparatus for mixing signals

Life of this patent

Abstract

Claims17