Remotely powered low power oscillator

A method comprising:

• an oscillator core, in a first environment, generating an oscillating signal;
• a power management system, in a second environment, supplying power to the oscillator core to operate the oscillator core, including supplying the power from a voltage source to the oscillator core via a pass transistor by applying a current output of the pass transistor to the oscillator core;
• a sensing system, in the first environment, sensing one or more parameters of the oscillator core that are dependent on a temperature of the oscillator core, and generating one or more temperature dependent signals representing said temperature of the oscillator core;
• transmitting the one or more temperature dependent signals representing the temperature of the oscillator core from the sensing system to the second environment;
• and
• using the one or more temperature dependent signals representing the temperature of the oscillator core in the second environment to generate a reference signal, and using the generated reference signal to determine the power supplied to the oscillator core from the power management system, including applying an output of an error amplifier to a gate of the pass transistor to control the current output of the pass transistor, wherein:
• the oscillator core generates an oscillating signal having a variable amplitude;
• and
• the sensing system sensing one or more parameters of the oscillator core includes the sensing system sensing the amplitude of the oscillating signal.

A system comprising:

• an oscillator core, in a first environment, for generating an oscillating signal;
• a power management system, in a second environment, for supplying power to the oscillator core to operate the oscillator core, including a pass transistor for supplying the power from a voltage source to the oscillator core by applying a current output of the pass transistor to the oscillator core, and an error amplifier for applying an output of the error amplifier to a gate of the pass transistor;
• a sensing system, in the first environment, for sensing one or more parameters of the oscillator core that are dependent on a temperature of the oscillator core, for generating one or more temperature dependent signals representing said temperature of the oscillator core, and for transmitting the one or more temperature dependent signals representing the temperature of the oscillator core from the sensing system to the second environment;
• and
• wherein the one or more temperature dependent signals representing the temperature of the oscillator core are used in the second environment to generate a reference signal, and the reference signal is used to determine the power supplied to the oscillator core from the power management system, including applying the output of the error amplifier to the gate of the pass transistor to control the current output of the pass transistor and the power supplied by the power management system to the oscillator core to operate the oscillator core, wherein the using the one or more temperature dependent signals to generate a reference signal includes:
• applying the one or more temperature dependent signals to a peak voltage detector in the second environment to generate a peak voltage signal in the second environment representing the temperature of the oscillator core.

A system comprising:

• a power source, in one environment, for supplying power to an oscillator core, in another environment to operate the oscillator core, including a pass transistor for supplying the power from a voltage source to the oscillator core by applying a current output of the pass transistor to the oscillator core, and an error amplifier for applying an output of the error amplifier to a gate of the pass transistor;
• a monitor, in the another environment, for monitoring one or more parameters of the oscillator core that are dependent on a temperature of the oscillator core, for generating one or more temperature dependent signals representing said temperature of the oscillator core, and for transmitting the one or more temperature dependent signals representing the temperature of the oscillator core from the another environment to the one environment, and wherein the one or more temperature signals representing the temperature of the oscillator core are used in the one environment to generate a reference signal, and the reference signal is used to determine the power supplied to the oscillator core from the power source, including applying the output of the error amplifier to the gate of the pass transistor to control the current output of the pass transistor and the power supplied by the power source to the oscillator core to operate the oscillator core, wherein the using the one or more temperature dependent signals to generate a reference signal includes:
• applying the one or more temperature dependent signals to a peak voltage detector in the second environment to generate a peak voltage signal in the second environment representing the temperature of the oscillator core.

A method comprising:

• an oscillator core, in a first environment, generating an oscillating signal;
• a power management system, in a second environment, supplying power to the oscillator core to operate the oscillator core, including supplying the power from a voltage source to the oscillator core via a pass transistor by applying a current output of the pass transistor to the oscillator core;
• a sensing system, in the first environment, sensing one or more parameters of the oscillator core that are dependent on a temperature of the oscillator core, and generating one or more temperature dependent signals representing said temperature of the oscillator core;
• transmitting the one or more temperature dependent signals representing the temperature of the oscillator core from the sensing system to the second environment;
• and
• using the one or more temperature dependent signals representing the temperature of the oscillator core in the second environment to generate a reference signal, and using the generated reference signal to determine the power supplied to the oscillator core from the power management system, including applying an output of an error amplifier to a gate of the pass transistor to control the current output of the pass transistor, wherein
• the using the one or more temperature dependent signals to generate a reference signal includes:
• applying the one or more temperature dependent signals to a peak voltage detector in the second environment to generate a peak voltage signal in the second environment representing the temperature of the oscillator core;
• and
• the using the generated reference signal to determine the power supplied to the oscillator core from the power management system further includes:
• setting a specific value of the current from the power management system to the oscillator core;
• obtaining an amplitude of the oscillator core;
• setting the second environment to an initial setting to obtain a desired voltage change in an output of the oscillator core;
• detecting a value of the peak voltage signal;
• and
• adjusting the second environment until the value of the peak voltage signal is equal to a desired value.

A method comprising:

• an oscillator core, in a first environment, generating an oscillating signal;
• a power management system, in a second environment, supplying power to the oscillator core to operate the oscillator core, including supplying the power from a voltage source to the oscillator core via a pass transistor by applying a current output of the pass transistor to the oscillator core;
• a sensing system, in the first environment, sensing one or more parameters of the oscillator core that are dependent on a temperature of the oscillator core, and generating one or more temperature dependent signals representing said temperature of the oscillator core;
• transmitting the one or more temperature dependent signals representing the temperature of the oscillator core from the sensing system to the second environment;
• and
• using the one or more temperature dependent signals representing the temperature of the oscillator core in the second environment to generate a reference signal, and using the generated reference signal to determine the power supplied to the oscillator core from the power management system, including applying an output of an error amplifier to a gate of the pass transistor to control the current output of the pass transistor, and
• further comprising employing current mode signaling between the first and second environments to reduce DC voltage drop and electromagnetic cross-talk due to instrumentation wiring between the first and second environments.