The high frequency cascode amplifiers with the combined circuits of the inherent compensation of the cross capacitance of the output transistor and resistor of the load

Author

Prokopenko, N.N. ; Butyrlagin, N.V. ; Pakhomov, I.V.

Author_Institution

Don State Tech. Univ., Rostov-on-Don, Russia

fYear

2014

fDate

25-27 Nov. 2014

Firstpage

671

Lastpage

674

Abstract

The method of increasing (by 5÷10 times) of the voltage transfer ratio (Gain) of the broadband cascode amplifiers (BCA) with the passive load in the form of the relatively low-ohmic resistor (R1=0.5÷1 kOhm) is considered. The effect of the increase of the gain of BCA is provided due to the introduction of a special circuit of the inherent compensation R1. The architectures of BCA on the bipolar and CMOS transistors are suggested in which the circuits of compensation of R1 and the cross capacitance of the output transistor are combined. It increases the Gain and also enlarges the upper cutoff frequency of BCA (f_c) in those cases when the characteristic time of the cross capacitance dominates.

Keywords

CMOS analogue integrated circuits; HF amplifiers; bipolar transistors; wideband amplifiers; BCA gain; CMOS transistors; bipolar transistors; broadband cascode amplifiers; combined circuits; cross capacitance; high-frequency cascode amplifiers; inherent compensation; load resistor; low-ohmic resistor; output transistor; passive load; upper cutoff frequency; voltage transfer ratio; Broadband amplifiers; CMOS integrated circuits; Capacitance; Cutoff frequency; Resistance; Resistors; Transistors; broadband cascode amplifiers; collector load; converter “voltage-current”; cross capacitance; the inherent compensation; upper cutoff frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Forum Telfor (TELFOR), 2014 22nd

Conference_Location

Belgrade

Print_ISBN

978-1-4799-6190-0

Type

conf

DOI

10.1109/TELFOR.2014.7034498

Filename

7034498