IP Portal

XH035: BIAS Library: RF_BIAS_CELLS. BIAS is a bias cell intended for use with the various RF building blocks. It is based on a bandgap reference and voltage-to-current converters. Current biasing is preferable because of the higher immunity to interferenc

Bandgap Voltage Reference and Current Bias Cell.

Current Reference and Current Biasing Cell.

Comparator Cell with N-Channel Inputs

Resistive String architecture.

Operational Amplifier Cell with P-Channel Inputs

Reference Amplifier

Power On Reset cell

Connectivity IP. This is a product chip.

The MR74039 is a fully integrated temperature sensor with a 12 Bit digital output designed in the XFab 0.35um XH035 process. It utilises a 12 bit Sigma Delta ADC for increased precision (0.25ºC). The temperature measurement range is fr

LNA  and optional mixer based on XH035 process. Measured noise figure below 1dB including mixer. Described in a paper on the web site.  The techniques are readily applied to other processes.

Novel aproach to Direct Digital Synthesis, using a voltage-ladder reference. Accuracy is achieved by using a full resistor ladder array, so bit size equivalent to 12 bits has been shown. Prototypes using an 8 bit system are available on

Very low power (3V, 25uA) 90 degree analogue phase shifter for SSB encoding/decoding. A full description is on the web site, with all measurements.

SA00AH8A00 is a subranging 8-bit high-speed 50MS/s Analog-to-Digital Converter(ADC) for video band and disk servo use.

SA00AH8B00 is a subranging  8-bit low-power 25MS/s Analog-to-Digital Converter(ADC) for disk servo use.

SA00PFC000 is a PLL with internal loop filter. Wide output clock freq. range : 10MHz～200MHz. Wide input clock freq. range : 2MHz～50MHz

SA00PFC010 is a PLL with internal loop filter. Wide output clock freq. range : 10MHz～160MHz. Wide input clock freq. range : 2.5MHz～6MHz.

SA00DJAA00 is a high-speed  50MS/s Digital-to-Analog Converter(DAC) for video band use.

The dT2120 is designed featuring low-voltage and low-power mono ADC (Analog-to -Digital Converter) for sensor applications. The ADC architecture is using 4th-order 1bit sigma-delta modulator with 64-times oversampling. The dT2120’s in

General purpose linear voltage regulator. The circuit generates a 3.3V output voltage from an unregulated input voltage ranging from 5V to 30V. It features short circuit protection and 5mA output current capability.

2Low consumption Power-On Reset (POR) core. The core has a voltage sense (configurable 0.9V - 5.5V), an internal current bias circuit and two configurable assertion delays (default are > 1μs and > 20μs). A configurable hysteresis (default 100mV).

Low consumption combo voltage and current reference core. The circuit generates an unbuffered 1.29V, temperature compensated voltage reference (70ppm/°C) and provides a 1.6μA PMOS current branch (200ppm/°C).

Low power, general purpose, 10-bit, 50kSPS, Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC) core. The circuit uses one 3.3V analog supply and one 3.3V digital supply and is targeted for microcontroller applications.

General purpose, low power internal oscillator core, 12MHz. The circuit has internal level shifting and start-up circuits. A 4-bit digital bus allows frequency calibration against process variations. Current consumption <40μA, supply voltage 2.7V-3.6V

General purpose capacitive sensor core. The circuit is intended for touch sensing applications for use in microcontrollers and has two multiplexed inputs. 3pF input sensibility and output frequency of 460kHz - 600kHz.

30V/20mA Power Driver/Switch - Two modes of operation: switch or programmable current output; short-circuit protection, over-current detection.

250kHz PWM for DC-DC converters

High Voltage Input for input voltages up to 100V

 XH018 LP3MOS 1.8V abgpc01_1v8 is a general purpose 1.2V bandgap reference with N-well resistirs and PNP (qpvc) diode matrix

XH018 LP3MOS 1.8V abgpc05_1v8 is a general purpose 1.2V bandgap reference with N-well resistors and NPN (qnva) diode matrix.