Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – Combining of plural signals
Patent
1996-04-12
1997-11-18
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Specific input to output function
Combining of plural signals
327 40, G06G 712
Patent
active
056892071
ABSTRACT:
A front-end circuit which receives a first input signal and a second input signal, and outputs an output signal having a differential frequency between the first input signal and the second input signal includes: a first amplifier having an input terminal, a power supply terminal and a virtual ground; a second amplifier having an input terminal, a power supply terminal and a ground; and a mixer having a first and a second input terminals, a power supply terminal and a virtual ground. In the front-end circuit, the virtual ground of the mixer is dc-coupled to the power supply terminal of the first amplifier, the virtual ground of the first amplifier is dc-coupled to the power supply terminal of the second amplifier, the power supply terminal of the first amplifier and the second amplifier are ac-coupled to the first and the second input terminals, respectively, and the input terminal of the first amplifier and the input terminal of the second amplifier receive the first and the second input signals, respectively, and a power supply voltage is supplied to the power supply terminal of the mixer and the ground.
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H. Morkner et al., 1995 IEEE MTT-S Digest, pp. 527-530, 1995 "A Novel 3V, 7mA PHEMT GaAs Active MMIC Mixer/LNA for Wireless Applications".
Itoh Jyunji
Nakatsuka Tadayoshi
Matsushita Electric - Industrial Co., Ltd.
Tran Toan
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