14
Apr
Gain Boosting Amplifier Design. Lets discussAdditional readingHistory of the Tube Screamer. From the ADC s design specification the design objective of the OTA was confirmed. A fully differential telescopic OTA used in a high speed ADC was designed. Hi I am going to design the gain boosting opamp with gain120dB and UGB40Mhz.
Design of a gain-boosted telescopic fully differential amplifier with CMFB circuit. Amplifier design approach proposed for filter applications uses positive-feedback techniques to enhance the amplifier DC-gain without limiting its high frequency performance. Shift oscillation and frequency response cannot be ignored if the booster and amplifier are to work well together. A fully differential telescopic OTA used in a high speed ADC was designed. Both the main opamp and the boosted opamp are fully differential folded-cascode opamp. The design of booster stages which achieve power gain while maintaining good dynamic performance is a difficult challenge.
The gain-boosting technique improves accuracy of cascoded CMOS circuits without any speed penalty.
The paper presents the design of a fully differential gain boosted operational amplifier opamp. Because the booster is a gain stage with its own inherent AC characteristics the issues of phase shift oscil-lation and frequency response cannot be ignored if the booster and amplifier are to work well together. This design is intended for applications where simplicity of layout small cell size and low power are important. Hi I am going to design the gain boosting opamp with gain120dB and UGB40Mhz. Based on SMIC 013 μm 33 V PDK Spectre simulation result shows that the OTA has the gain of 1058 dB. To increase the gain of AC signalsthe emitter resistor bypass capacitor C3 is added.