Transkonduktanzverstärker mit drei Eingängen und verschmolzener Stromklemmschaltung, zur Verwendung in einem Oszillator

• Main Author: KHOURY, JOHN MICHAEL
• Format: Patent
• Language: German
• Published: 07.08.1997
• Edition: 6
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; GENERATION OF NOISE BY SUCH CIRCUITS; GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER

A clamped linear transconductance amplifier path, consisting essentially of a current clamp (M23) merged in a linear transconductance amplifier (M23, M21, M22) path, is used in a triple-input, triple-output transconductor (200). In a balanced transconductor in CMOS technology, this clamped linear transconductance amplifier path is formed by a p-channel MOS transistor (M23) separately connected in series with each of a matched pair of p-channel MOS transistors (M21, M22). The clamped linear transconductance amplifier path, together with two other transconductance paths (M15-M20; M9-M14), can be interconnected to form the input side of the triple-input, triple-output transconductor (200). By summing and integrating the outputs of the input side of the triple-input transconductor (200), the output (VOUT,P and VOUT,N) of the output side of the transconductor can be formed. By feeding back this output to the input side of the transconductor (200), an oscillator can obtained.