Title:
POWER DETECTOR
Document Type and Number:
Japanese Patent JPS60205376
Kind Code:
A
Abstract:
A junction field effect transistor circuit is used to detect the power level contained in radio frequency signals over a wide range of frequencies and signal levels. The radio frequency signal is coupled to the drain of a junction field effect transistor, the gate of which is biased at a d.c. potential equal to the pinch off voltage. The radio frequency signal is also coupled to the gate. The resulting current from the source contains a d.c. term proportional to the square of the magnitude of the radio frequency signal, as well as time varying signal components. A low pass filter is employed to remove the time varying signal components from the resulting source current to produce a D.C. output current which is proportional to the power level of the input signal.
Inventors:
RONARUDO EE BARETSUTO
Application Number:
JP4354985A
Publication Date:
October 16, 1985
Filing Date:
March 05, 1985
Export Citation:
Assignee:
TEKTRONIX INC
International Classes:
G01R21/06; G01R21/00; G01R21/10; (IPC1-7): G01R21/06
Domestic Patent References:
| JPS4732866A | 1972-11-16 |
Attorney, Agent or Firm:
Sada Ito (1 person outside)
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