Remote transmitter and method

Transmitter circuitry for a portable dog-training transmitter unit including first, second, and third switches for controlling first, second, and third functions, respectively, represented by stimulus control signals to be transmitted, and a multiple-position detent switch for setting the amplitudes of the stimulus signals to be transmitted, the transmitter circuitry including:

• i. a controller having a plurality of inputs coupled to the first, second, and third pushbutton switches and the thumbwheel detent switch, the controller including a first output conducting digital data representative of the states of the first, second, and third pushbutton switches and the thumbwheel detent switch;
• ii. a buffer circuit having an input coupled to the first output of the controller for shaping pulses constituting the digital data;
• iii. an FM modulator having an input coupled to an output of the buffer, for performing the function of modulating the carrier with the desired digital data;
• iv. an FM preamplifier having an input coupled to an output of the FM modulator, for performing the function of buffering an oscillator and amplifying a signal produced by the FM modulator for use in a subsequent stage;
• v. a matching network having an input coupled to an output of the FM preamplifier;
• vi. a power amplifier having an input coupled to an output of the matching network;
• and
• vii. a single pi matching network having an input coupled to an output of the power amplifier and an output coupled to the antenna.