Download Analog Circuit Design Techniques at 0.5V (Analog Circuits by Shouri Chatterjee, K.P. Pun, Nebojša Stanic, Yannis PDF

By Shouri Chatterjee, K.P. Pun, Nebojša Stanic, Yannis Tsividis, Peter Kinget

This e-book tackles demanding situations for the layout of analog built-in circuits that function from ultra-low strength provide voltages (down to 0.5V). assurance demonstrates the sign processing circuit and circuit biasing methods during the layout of operational transconductance amplifiers (OTAs). those amplifiers are then used to construct analog procedure capabilities together with non-stop time filter out and a pattern and carry amplifier.

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Additional info for Analog Circuit Design Techniques at 0.5V (Analog Circuits and Signal Processing)

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A current is drawn by the device which creates a voltage drop across the resistors. 25 V. 15 V. This well defined IR voltage drop is ratio-ed and transferred to the level shifters in Fig. 9 through M7 , R1A , R2A and M14 , R2A , R2B . A compensating capacitor, CCL , is used to stabilize the feedback loop. 25 V VL VL Vamp Vamp Fig. 13: Biasing the level-shifting current source. 3 Setting the OTA output DC common-mode voltage The bias voltage Vbn in Fig. 8(b) adjusts the biasing level of the nMOS devices compared to the pMOS devices and allows it to control the DC output common-mode voltage of the OTA.

The series resistor RC moves the zero introduced by CC from the right half plane to the left half plane. 2: Component sizes and values for the gate-input operational transconductance amplifier (Fig. 9). 18 µm triple-well CMOS process. 2. Throughout the design a larger than minimum channel length was used to limit the reverse short-channel effect and to take advantage of lower VT devices, as shown in Fig. 1(b). 36 µm was chosen for all devices in this circuit as a compromise in the trade-off between lower VT , larger area requirements, and larger parasitic capacitances.

The small-signal equivalent circuit of the body-input gain stage of Fig. 2, is shown in Fig. 3. The differential DC gain is: 20 2 Fully Differential Operational Transconductance Amplifiers (OTAs) von + rds1 || rds2 || rds3 rds4 R vc + rds1 || rds2 || rds3 R gmb1vip vop + gmb1vin + vip (gm2+gm3)vc gmb3von gmb3vop + vip (gm2+gm3)vc - - Fig. 3: Small-signal equivalent circuit of a body-input OTA stage. 2) The common-mode signal is strongly suppressed as a result of gm1 being larger than gmb1 and is intrinsically less than 1.

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