by minicircuitsadmin | Oct 6, 2015 | Engineering Resources, VCOs
The basic form of a phase locked loop (PLL) consists of a voltage controlled oscillator (VCO), a phase detector (PD), and a filter. In its more general form (Figure 1), the PLL may also contain a mixer and a digital divider. In the steady state, the frequency of the...
by minicircuitsadmin | Sep 6, 2015 | Engineering Resources, VCOs
The design example covered here is an 800 to 900 MHz synthesizer in 100 kHz steps with a minimum output power of 10 mW across the band. Mini-Circuits model POS-1060, a low noise voltage controlled oscillator that operates over the range of 750 to 1060 MHz, is used....
by minicircuitsadmin | Aug 8, 2015 | Engineering Resources, VCOs
Practical Techniques It is always a good design philosophy to provide RF bypassing of power and DC control lines to the VCO. This is indeed the case when the VCO is located some distance away from the power supply. RF chokes and good bypassing capacitors of...
by minicircuitsadmin | Jul 15, 2015 | Engineering Resources, VCOs
How to Measure Output Power and Frequency Figure 1 is a block diagram of the setup for this measurement. Well regulated power supplies are recommended for tuning and VCO supplies. Bias tee’s in the DC and tuning voltage lines help reduce the power supply noise....
by minicircuitsadmin | Jun 10, 2015 | Engineering Resources, VCOs
Characterizing Phase Noise The term phase noise is widely used for describing short term random frequency fluctuations of a signal. Frequency stability is a measure of the degree to which an oscillator maintains the same value of frequency over a given time. This may...
by minicircuitsadmin | May 30, 2015 | Engineering Resources, VCOs
Introduction Voltage controlled oscillators (VCOs) are normally designed for operation into ideal 50Ω impedance. Actual loads into which they work are seldom ideal. It is a standard industry practice to measure the variation of the frequency when the VCO output is...
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