MXR-NT905/06/10/11 provides a high level of integration, with high performance operation and low power consumption. The MXR-NT905/06/10/11 operates over an industrial temperature range of -20C to +65C and over the supply voltage range of 2.7 to 3.3 VDC. The receive section consists of several major functional blocks, including a switchable RF input attenuator, quadrature mixer (down-conversion), differential to single-ended convertor, variable gain amplifi (VGAs), PLL synthesizer with voltage controlled oscillator (VCO), I/Q low-pass filters, DC offset correction circuit, quadrature mixer (upconversion), zero-crossing detector, Period-to-Digital converter (P/D), Linearization ROM, and a Digital-to-Analog converter (DAC). Additionally, it contains a reference crystal oscillator with automatic frequency control (AFC) circuit and associated reference frequency synthesizer. The transmit section consists of a PLL synthesizer with a directly modulated voltage controlled oscillator (VCO), and a RF power amplifier (PA).