Analog Circuits

15% (3σ) from -40ºC to 125ºC. This level of performance, previously only achieved by trimming at two or more temperatures [1, 2], was obtained by using chopping and curvature correction to minimize non-PTAT (proportional

University of Pavia, Pavia, Italy National Semiconductor, Rozzano, Italy 2 A key limit of the chopper stabilized technique is that the low-frequency noise after being shifted up to the chopping frequency is only partiall

Delft University of Technology, Delft, Netherlands IBM, Burlington, VT 2 In wireless receivers, large dynamic range (DR) input signals necessitate additional power consumption in baseband active filters. A 5th order Cheb

Most electronic systems require a frequency reference, and so, much research has been devoted to the realization of on-chip frequency references in standard CMOS. However, the accuracy of such references is limited by th

In a direct-conversion wireless receiver the baseband filter should be able to handle large blockers, resulting in a very challenging spurious free dynamic range (SFDR) requirement. In particular, the noise added in-band

In this paper, a scheme for tuning cutoff-frequency of filters is presented. Instead of using a multibit resistor bank, a 1b switched-resistor structure operating at 200MHz is utilized. The effective RC time constant is

likely the successor would be the FinFET. The FinFET is an ultra-thin body multi-gate MOS transistor with among other characteristics a much higher voltage gain compared to a conventional bulk MOS transistor [1]. Bandgap

block in portable communication systems for power management ICs. The LDO usually comes after a switching DC-DC converter to reduce the output ripples and provide a regulated voltage source for noise-sensitive blocks. Fo

Clocked regenerative comparators, which use positive feedback of a latch to force a fast decision, are used for many applications. In [1] a 10GHz 3-stage comparator in 1.2V 0.11µm CMOS is presented and is designed to ext

A current-feedback instrumentation amplifier (CFIA) is presented that uses ping-pong auto-zeroing and chopping to reduce offset, 1/f noise, and output ripple. CFIAs are attractive because of their ability to sense differ

In the precision mechatronics of wafer steppers, thermal expansion is an important source of error. To compensate for this, the temperature of critical mechanical components must be measured with high resolution (<1µK),

Polar modulation has been proven to be an effective way to build high-efficiency high-linearity power amplifier systems [1]. In a polar transmitter, high-efficiency non-linear power amplifiers can be used for linearly mo

KAIST, Daejeon, Korea JDA Technology, Daejeon, Korea 3 LG Electronics, Pyungtaek, Korea 2 Previously reported switching DC-DC converters have feedback loops incorporating error amplifiers to regulate their output voltage

T. Peltola2, T. Teppo2 1 University of Pavia, Pavia, Italy National Semiconductor, Oulu, Finland 2 Minimizing power consumption in multi-processor systems requires the use of multiple supplies with a wide range of regula

Portable applications often need multiple voltages controlled by a power management IC to power up many functional blocks [1]. A switching pre-regulator is usually followed by a low dropout (LDO) regulator to provide a r

In order to be useful for mobile systems, the switching frequencies of modern buck converters (BCs) are in the MHz- or even GHzrange to enable the use of compact off-chip inductors and capacitors [1], or even on-chip Ls

circuits like analog-to-digital converters, voltage regulators, DRAMs, flash memories and other communication devices. The demands for smaller area, lower power consumption, and lower sensitivity to changes in supply vol

levels at high efficiencies, Class-D amplifiers are extremely attractive for systems-on-chip in mobile and low-power applications, where battery life and reduced thermal dissipation are crucial parameters. One modificati

A versatile low-power headphone driver that can be used in a variety of portable electronic devices is desirable for compatibility and to reduce design-cycle time. Capacitive loads as large as 20nF are used in some platf