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US 2013/0243120 A1Published application
Ask modulator and transmitter having the same
AssigneeFavepc Inc.
InventorsChun-Liang Tsai, Shao-Chang Chang
Life of this patent
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Abstract
A modulator which has a first terminal to receive a carrier signal, a second terminal to receive a first control signal to control a frequency band of the carrier signal and a third terminal to receive a second control signal to control a modulation depth of the carrier signal.
Claims20
A modulator comprising:
- a first terminal to receive a carrier signal;
- a second terminal to receive a first control signal to control a frequency band of the carrier signal;
- and
- a third terminal to receive a second control signal to control a modulation depth of the carrier signal.
1 more element
A transmitter comprising:
- a carrier generator for generating a carrier signal;
- an amplification having an input terminal connected to the carrier generator;
- a modulator having a first terminal connected to an output of the amplification circuit;
- and
- an antenna having an input connected to the modulator.
2 more elements
A modulator comprising:
- a variable resistor being provided with a voltage level;
- a switch connected in series to the variable resistor;
- a first resistor connected in parallel to the switch;
- a second resistor connected in series to the first resistor;
- a first inductor having a first terminal connected to the second resistor and a second terminal to receive a carrier signal;
- a PIN diode having an anode connected to the second terminal of the first inductor and an cathode to output a modulated signal;
- and
- a second inductor having a first terminal connected to the cathode of the PIN diode and a second terminal, wherein the second terminal is grounded.
5 more elements
Dependencies are inferred from the claim text.