FM Modulator using an oscillating feedback circuit

FM Modulator using variable transistor capacitance

FM signal oscillator circuit and modulation level control...

FM to AM converter

FM-AM converter

Four state phase shift modulator, in particular for amplitude mo

Four-phase staggered shift keying modulator system

Fractional frequency synthesizer with modulation linearizer

Fractional-cycle time/amplitude modulation

Fractional-division frequency synthesizer for digital angle-modu

Fractional-N offset phase locked loop

Fractional-N synthesizer having modulation spur compensation

Frequency agile method for transmitting multi-level data

Frequency converter, orthogonal demodulator and orthogonal...

Frequency discriminator and frequency modulator incorporating su

Frequency extended digitally generated FM

Frequency generator arrangement

Frequency generator for generating two independent FSK signals

Frequency generator with digitally controlled phase modulation

Frequency linearization and sensitivity equalization of a freque