FREQUENCY MODULATION CIRCUIT EMPLOYING VARACTOR DIODEPURPOSE: To provide the high frequency deviation is obtained even when a voltage level of input data to an FSK modulation circuit employing the varactor diode is low.ICHIKAWA YUICHI市川 裕一
PURPOSE:To attain sufficient reproducibility by adding a high frequency signal having a sufficiently higher frequency than that of a modulation signal, and adding a DC bias and the modulation signal to a varactor diode being a component of a frequency modulator so as to improve the linearity of ...
A common way to vary the frequency of the VCO is to use a varactor diode, which has a capacitance vs. voltage transfer characteristic, in the frequency-determining resonant circuit of the oscillator. Sign in to download full-size image Fig. 5.6. Frequency synthesizer. The frequency synthesizer...
It is pointed out that, although the capacitance variation ratio n(log C(V)/log V) is less than 2, the capacitance variation ratio increases with the varactor diode bias voltage so that good modulation linearity can be obtained. Furthermore adopting a push-pull mode of operation, two UHF ...
Frequency modulation (FM). Modulators for FM are, in effect, voltage-controlled oscillators, in which the input voltage determines the output frequency. There are several types, of which the varactor-tuned oscillator is probably the simplest (see also Section 11.3.4). 9.4.1 The varactor-tuned ...
In addition, four varactor diodes (SMV-2019, Skyworks, Inc.) and four chip capacitors (0.1 pF) are soldered across the metallic slots on the top of the meta-atom for altering its reflection phase with different biasing voltages. In the simulations, the diode can be modeled as a ...
A varactor diode frequency multiplier approach has been chosen for the transmitter ... A Chu,WE Courtney,LJ Mahoney - 《Microwave Journal》 被引量: 9发表: 1983年 Parametric THz frequency multiplication using CMOS technology Accumulation-mode MOS varactors (AMOSVs) are considered for use in THz ...
Frequency modulation (FM). Modulators for FM are, in effect, voltage-controlled oscillators, in which the input voltage determines the output frequency. There are several types, of which the varactor-tuned oscillator is probably the simplest (see also Section 11.3.4). 9.4.1 The varactor-tuned ...
Experimental test results based on the AC Stark effect demonstrate that the resonator has the electric field enhancement capability from 323 MHz to 443 MHz by changing the bias voltage of the varactor diode. This tunable electric field enhancement resonator is expected to improve the ability of ...
A common way to vary the frequency of the VCO is to use a varactor diode, which has a capacitance vs. voltage transfer characteristic, in the frequency-determining resonant circuit of the oscillator. Sign in to download full-size image Fig. 5.6. Frequency synthesizer. The frequency synthesizer...