This is a design note about a low-power, direct-to-digital IF receiver. The receiver uses a variable gain amplifier + analog-to-digital converter (VGA + ADC) combination circuit that preserves the IF receiver dynamic range over a 31dB gain adjustment range and effectively demodulates and digitizes both the I and Q signals.
This document describes a dual output synchronous boost converter that solves thermal problems in harsh environments. By replacing the Schottky output rectifier with a synchronous MOSFET rectifier, power dissipation can be reduced, eliminating the need for heat sinks and reducing costs.
This document introduces a method of fast time division duplex (TDD) transmission using an upconverting mixer with a high side switch. This method achieves fast Tx switching by applying a power switch at the transmit upconverting mixer, which removes both the transmit signal and all other mixing products from the mixer RF output. This method has the advantages of low cost, good performance and power saving during the Tx off-time.
This design note introduces the LTC3890 high effi ciency dual output step-down converter that can produce 3.3V and 8.5V outputs from a 9V to 60V rail. This 50μA quiescent current device can produce two output voltages ranging from 0.8V to 24V when powered from an input voltage of 4V to 60V. The device features up to 99% duty cycle capability for low voltage dropout applications, adjustable soft-start or voltage tracking and selectable continuous, pulse-skip- ping or Burst Mode® operation with a no-consumption standby mode.
The LTC3855 is a synchronous buck controller from Linear Technology that can generate high current rails with the accuracy and efficiency to satisfy the most demanding requirements of today’s leading edge network, telecommunications and server applications. It features strong gate drivers that support operation with per-phase currents above 20A, an accurate 0.6V ±0.75% reference, and an integrated differential amplifier (diff amp) that allows remote sensing of the output of critical rails.
This document introduces the LTC6601-1/-2 and LTC6605-7/-10/-14, 3 precision matched baseband filter ICs that provide precision filtering performance in the 1.25MHz to 20MHz frequency range.
The LT3682 is a new 1A buck regulator that overcomes the duty cycle limitation by monitoring the current through the external catch diode, and delaying the generation of new switch pulses if this current exceeds a defined value. The LT3682 safely accommodates output shorts and overload conditions.
This document introduces a new type of DC/DC regulator system that can produce two 4A outputs from a 4.5V to 26.5V input voltage range, and only requires a few external components.
This Design Note addresses some of the practical implications and demonstrates specific single-ended applications using the 3GHz gain-bandwidth LTC6406 differential I/O amplifier.
The LTC3577/LTC3577-1 integrates multiple portable device power management functions into one IC, reducing complexity, cost and board area in handheld devices. It includes five voltage regulators, a battery charger and PowerPath™ manager, an LED driver, and pushbutton control. By combining these functions, the LTC3577/LTC3577-1 not only reduces the number of required ICs but also solves the problems of functional interoperability, improving end-product performance.
This Design Note introduces the LTM4615, a triple output DC/DC µModule® regulator that can replace up to 30 discrete components in a 15mm×15mm×2.8mm surface mount package.
