Modulators – Amplitude modulator – Suppressed carrier double sideband type
Patent
1992-03-16
1992-12-15
Grimm, Siegfried H.
Modulators
Amplitude modulator
Suppressed carrier double sideband type
332178, 455109, 455333, H03C 154
Patent
active
051720795
ABSTRACT:
A balanced modulation circuit includes first, second, and third differential amplifiers. The first differential amplifier includes first and second transistors (Q11, Q12) having the emitters connected to first and second constant-current sources (CS11, CS12) and also connected with each other through a resistor, the collectors connected to the power supply line through respective base-collector-coupled transistors (Q13, Q14) used as diodes, and the bases connected to a first voltage source (V11) through respective resistors (R11, R12). The second differential amplifier includes third and fourth transistors (Q17, Q18) having the emitters connected to the collector of a transistor (Q15) whose base is connected to the base of the transistor (Q14) and whose emitter is connected to the power supply line, the bases of the third and fourth transistors (Q17, Q18) are connected to a second voltage source (V12) through respective resistors, and the collectors are connected to the ground line through respective resistors. The third differential amplifier includes fifth and sixth transistors (Q19, Q20) having the emitters connected to the collector of a transistor (Q16) whose base is connected to the base of the transistor (Q13) and whose emitter is connected to the power supply line, the bases of the fifth and sixth transistors (Q19, Q20) are respectively connected to the bases of the fourth and third transistors (Q18, Q17), and the collectors are respectively connected to the collectors of the third and fourth transistors (Q17, Q18).
REFERENCES:
patent: 4278954 (1981-07-01), Fujisaki
patent: 4344188 (1982-08-01), Tanabe et al.
Alan B. Grebene, "Analog Integrated Circuit Design" (published by Litton Educational Publishing Inc. 1972), translated by S. Nakazawa, et al. pp. 236-238, Kindai-Kagaku Ltd., Tokyo 1975.
Grimm Siegfried H.
Sharp Kabushiki Kaisha
LandOfFree
Balanced modulator designed for low supply voltage does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Balanced modulator designed for low supply voltage, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Balanced modulator designed for low supply voltage will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2096139