Temperature-compensated logarithmic detector having a wide dynam

Details Temperature-compensated logarithmic detector having a wide dynam Temperature-compensated logarithmic detector having a wide dynam

1992-11-23

1994-03-22

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307310, 307491, 307494, 307418, H03F 130

Patent

active

052967611

ABSTRACT:
An IF amplifier/log detector with a modular architecture includes a plurality of voltage amplifiers, a plurality of rectifiers, a plurality of voltage-to-current converters and a current summing circuit. Each amplifier has a first differential transistor pair driven by a first current proportional to the temperature to fix the gain. Each converter includes a second differential transistor pair driven by a current proportional to the temperature and inversely proportional to a process parameter, and a third differential transistor pair driven by a third current inversely proportional to the process parameter. In this manner a circuit having improved performance with variations in temperature and process parameters is obtained.

REFERENCES:
patent: 3417263 (1968-12-01), Thomas
patent: 3745474 (1973-07-01), Hughes
patent: 3848139 (1974-11-01), Holt, Jr.
patent: 4053796 (1977-10-01), van de Plassche
patent: 4593268 (1986-06-01), Blauschild
patent: 4972512 (1990-11-01), Garskamp
patent: 5049829 (1991-09-01), Garskamp et al.
patent: 5070303 (1991-12-01), Dent
patent: 5130567 (1992-07-01), Rutten et al.
"Analysis and Design of Analog Integrated Circuits", Sec. Edition. P. Gray and R. Meyer, Wiley & Sons, 1984, pp. 197, 203, 275-284, 284-296.

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