Transit mixer with current mode input

Details Transit mixer with current mode input Transit mixer with current mode input

1995-11-07

1997-06-24

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Combining of plural signals

327357, 327105, 327119, 327103, H03B 1900

Patent

active

056420714

ABSTRACT:
A differential mixer (DM) used in a telecommunication radio transmitter able to operate with a 3 Volt supply includes a silicon bipolar cross-connected pair of differential amplifiers (A; B) for receiving a first input voltage (LO) at a high frequency, a pair of current sources (I1; I2), and a voltage-to-current MOS converter (VIC) for receiving a second input voltage (VIN) at a lower frequency. The converter is adapted to convert the low frequency voltage to a differential current (INN) and is coupled to the junction points of the amplifiers and the current sources. The converter further includes a regulated differential cascode circuit (P1; P2) to which the low frequency input voltage (VIN) is applied via resistors (RI1; RI2) and which is coupled to the supply terminals (VCC; GND) of the mixer via two pairs of constant current sources (PB1, PB2; NB1, NB2) respectively. Preferably, a constant reference voltage terminal (VCC/2) is applied to the gate electrode of the transistors (P1; P2) of the cascode circuit via an operational amplifier (O1; O2).

REFERENCES:
patent: 4458210 (1984-07-01), Horl
patent: 4675594 (1987-06-01), Reinke
patent: 4801827 (1989-01-01), Metz
patent: 4936516 (1990-06-01), Sempel
patent: 5115409 (1992-05-01), Stepp
patent: 5151625 (1992-09-01), Zarabadi et al.
patent: 5196742 (1993-03-01), McDonald
patent: 5329189 (1994-07-01), Ushida et al.
patent: 5396659 (1995-03-01), Kimura
patent: 5414383 (1995-05-01), Cusdin et al.
patent: 5532637 (1996-07-01), Khoury et al.
patent: 5548840 (1996-08-01), Heck
"Low Voltage Techniques for High Frequency Si-Bipolar Circuits", MWE '93 Microwave Workshop Digest, pp. 357-360 1993.
P. Gray et al, "Analysis and Design of Analog Integrated Circuits", John Wiley & Sons (New York) 1977, pp. 563-575 no month.

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